Bài 9: Mảng trong Java!

**seamonkey** · 10-28-2013, 07:00 AM

bài 1:
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Mã:

import java.util.scanner;
public class bt1 {
    public static void main(string[] args) {
        scanner input = new scanner(system.in);
        system.out.println("nhap vao so sinh vien:");
        int n = input.nextint();
        input.nextline();
        string[] sv = new string[n];
        for (int i =0; i<n; i++) {
            system.out.println("nhap ten sinh vien " + (i+1) + ": ");
            sv[i] = input.nextline();
        }
        system.out.println("nhap ten sinh vien can tim:");
        string ten = input.nextline();
        int a = 0;
        for (int i=0; i<n; i++) {
            if (sv[i].equals(ten)) {
                a++;
            }
        }
        system.out.println("tim duoc " + a + " sinh vien ten '" + ten + "'." );
    }
}

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bài 2:
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Mã:

import java.util.scanner;
public class bt2 {
    public static void main(string[] args) {
        scanner input = new scanner(system.in);
        system.out.println("so phan tu can sap xep:");
        int n = input.nextint();
        int[] daynguon = new int[n];
        system.out.println("nhap cac phan tu can sap xep:");
        for (int i = 0; i < n; i++) {
            daynguon[i] = input.nextint();
        }
        for (int i = 0; i < n; i++) {
            for (int j = (i+1); j < n; j++){
                if (daynguon[j] < daynguon[i]) {
                    int phu = daynguon[j];
                    daynguon[j] = daynguon[i];
                    daynguon[i] = phu;
                }
            }
        }
        system.out.println("day da duoc sap xep:");
        for (int i=0;i<n;i++) {
            if (i == (n-1)) {
                system.out.print(daynguon[i] + ".");
            } else{
            system.out.print(daynguon[i] + ", ");
            }
        }
    }
}

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bài 3:
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Mã:

import java.util.scanner;
public class bt3 {
    public static void main(string[] args) {
        scanner input = new scanner(system.in);
        system.out.println("so hang cua ma tran:");
        int h = input.nextint();
        system.out.println("so cot cua ma tran:");
        int c = input.nextint();
        system.out.println("nhap cac phan tu cua ma tran thu 1:");
        int[][] matran1 = new int[h][c];
        for (int i=0; i<h; i++) {
            system.out.println("hang " + (i+1) + " :");
            for (int j=0; j<c; j++) {
                matran1[i][j] = input.nextint();
            }
        }
        system.out.println("nhap cac phan tu cua ma tran thu 2:");
        int[][] matran2 = new int[h][c];
        for (int i=0; i<h; i++) {
            system.out.println("hang " + (i+1) + " :");
            for (int j=0; j<c; j++) {
                matran2[i][j] = input.nextint();
            }
        }
        system.out.println("ma tran thu 1:");
        for (int i=0; i<h; i++) {
            for (int j=0; j<h; j++) {
                system.out.print(matran1[i][j] + " ");
            }
            system.out.println("");
        }
        system.out.println("ma tran thu 2:");
        for (int i=0; i<h; i++) {
            for (int j=0; j<h; j++) {
                system.out.print(matran2[i][j] + " ");
            }
            system.out.println("");
        }
        int[][] matrantong = new int[h][c];
        for (int i=0; i<h; i++) {
            for (int j=0; j<h; j++) {
                matrantong[i][j] = matran1[i][j] + matran2[i][j];
            }
        }
        system.out.println("ma tran tong:");
        for (int i=0; i<h; i++) {
            for (int j=0; j<h; j++) {
                system.out.print(matrantong[i][j] + " ");
            }
            system.out.println("");
        }
    }
}

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**torodiep** · 11-05-2013, 07:00 AM

bài 1:
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Mã nguồn PHP:


[color=#000000]
package baitap1[/color][color=#007700]; [/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]util[/color][color=#007700].[/color][color=#0000bb]scanner[/color][color=#007700]; public class [/color][color=#0000bb]baitap1 [/color][color=#007700]{    public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]) {        [/color][color=#0000bb]int n[/color][color=#007700];        [/color][color=#0000bb]scanner nhapdulieu[/color][color=#007700]=new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);        do{            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhập số lượng sinh viên:"[/color][color=#007700]);            [/color][color=#0000bb]n[/color][color=#007700]=[/color][color=#0000bb]nhapdulieu[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();            if ([/color][color=#0000bb]n[/color][color=#007700]<[/color][color=#0000bb]0[/color][color=#007700]){                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"số lượng sinh viên phải >0"[/color][color=#007700]);            }        }while ([/color][color=#0000bb]n[/color][color=#007700]<[/color][color=#0000bb]0[/color][color=#007700]);             [/color][color=#0000bb]string arrsv[/color][color=#007700][]=new [/color][color=#0000bb]string[/color][color=#007700][[/color][color=#0000bb]n[/color][color=#007700]],[/color][color=#0000bb]tensv[/color][color=#007700];        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhập danh sách sinh viên:"[/color][color=#007700]);        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]n[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            [/color][color=#0000bb]nhapdulieu[/color][color=#007700]=new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"
sinh viên "[/color][color=#007700]+([/color][color=#0000bb]i[/color][color=#007700]+[/color][color=#0000bb]1[/color][color=#007700])+[/color][color=#dd0000]":"[/color][color=#007700]);            [/color][color=#0000bb]arrsv[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]=[/color][color=#0000bb]nhapdulieu[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhập tên sinh viên cần tìm kiếm:"[/color][color=#007700]);        [/color][color=#0000bb]tensv[/color][color=#007700]=[/color][color=#0000bb]nhapdulieu[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();        [/color][color=#0000bb]boolean flag[/color][color=#007700]=[/color][color=#0000bb]false[/color][color=#007700];        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]n[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            if([/color][color=#0000bb]tensv[/color][color=#007700].[/color][color=#0000bb]equals[/color][color=#007700]([/color][color=#0000bb]arrsv[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]])){                [/color][color=#0000bb]flag[/color][color=#007700]=[/color][color=#0000bb]true[/color][color=#007700]; break;            }            else continue;        }        if([/color][color=#0000bb]flag[/color][color=#007700]){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"sinh viên: "[/color][color=#007700]+[/color][color=#0000bb]tensv[/color][color=#007700]+[/color][color=#dd0000]" có trong ds"[/color][color=#007700]);        }        else{            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"sinh viên: "[/color][color=#007700]+[/color][color=#0000bb]tensv[/color][color=#007700]+[/color][color=#dd0000]" không có trong ds"[/color][color=#007700]);        }    }}[/color]

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bài 2:
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Mã nguồn PHP:


[color=#000000]
package baitap1[/color][color=#007700]; [/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]util[/color][color=#007700].[/color][color=#0000bb]scanner[/color][color=#007700]; [/color][color=#ff8000]//sắp xếp 1 dãy n số nguyên nhập vào từ bàn phím theo thứ tự tăng dần![/color][color=#007700]public class [/color][color=#0000bb]baitap2 [/color][color=#007700]{    public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]) {        [/color][color=#0000bb]int n[/color][color=#007700],[/color][color=#0000bb]arrint[/color][color=#007700][];        [/color][color=#0000bb]scanner scan[/color][color=#007700]=new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhập số lượng số nguyên:"[/color][color=#007700]);        [/color][color=#0000bb]n[/color][color=#007700]=[/color][color=#0000bb]scan[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        [/color][color=#0000bb]arrint[/color][color=#007700]=new [/color][color=#0000bb]int[/color][color=#007700][[/color][color=#0000bb]n[/color][color=#007700]];        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhập các số:"[/color][color=#007700]);        [/color][color=#ff8000]//nhập các số nguyên từ bàn phím        [/color][color=#007700]for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]n[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"
số thứ "[/color][color=#007700]+([/color][color=#0000bb]i[/color][color=#007700]+[/color][color=#0000bb]1[/color][color=#007700])+[/color][color=#dd0000]":"[/color][color=#007700]);            [/color][color=#0000bb]arrint[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]=[/color][color=#0000bb]scan[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        }        [/color][color=#ff8000]//in kết quả                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"dãy trước khi sắp xếp:"[/color][color=#007700]);                for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]n[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){                    [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#0000bb]arrint[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]+[/color][color=#dd0000]"\t"[/color][color=#007700]);                         }        [/color][color=#ff8000]//sắp xếp theo thứ tự tăng dần        [/color][color=#0000bb]int tg[/color][color=#007700];        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]n[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            for([/color][color=#0000bb]int j[/color][color=#007700]=[/color][color=#0000bb]i[/color][color=#007700]+[/color][color=#0000bb]1[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]<[/color][color=#0000bb]n[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]++){                if ([/color][color=#0000bb]arrint[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]>[/color][color=#0000bb]arrint[/color][color=#007700][[/color][color=#0000bb]j[/color][color=#007700]]){                    [/color][color=#0000bb]tg[/color][color=#007700]=[/color][color=#0000bb]arrint[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]];                    [/color][color=#0000bb]arrint[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]=[/color][color=#0000bb]arrint[/color][color=#007700][[/color][color=#0000bb]j[/color][color=#007700]];                    [/color][color=#0000bb]arrint[/color][color=#007700][[/color][color=#0000bb]j[/color][color=#007700]]=[/color][color=#0000bb]tg[/color][color=#007700];                }            }        }        [/color][color=#ff8000]//in kết quả        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"
dãy sau khi sắp xếp:"[/color][color=#007700]);        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]n[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#0000bb]arrint[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]+[/color][color=#dd0000]"\t"[/color][color=#007700]);                 }    }}[/color]

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bài 3:
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**saxagifts** · 11-14-2013, 07:00 AM

Gửi bởi tiasangmoi92

bạn dùng nhiều nextint, nhập nhiều thì có dấu cách là đc!

mình làm theo bạn rồi thì thấy từ phần tử thứ hai khi nhập tiếp dữ liệu cho p.tử 3, 4, 5..thì phải enter 2 lần. liệu có cách nào hay hơn không bạn

**nhiduongland** · 11-14-2013, 07:00 AM

bài 1:

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Mã nguồn PHP:


[color=#000000]
[/color][color=#ff8000]/** to change this license header, choose license headers in project properties.* to change this template file, choose tools | templates* and open the template in the editor.*/ [/color][color=#0000bb]package bai9[/color][color=#007700];[/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]util[/color][color=#007700].[/color][color=#0000bb]scanner[/color][color=#007700];[/color][color=#ff8000]/**** @author quangvu*/[/color][color=#007700]public class [/color][color=#0000bb]bai1 [/color][color=#007700]{    public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]) {        [/color][color=#0000bb]scanner nhap [/color][color=#007700]= new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);        [/color][color=#0000bb]string sv[/color][color=#007700][];        [/color][color=#0000bb]string tim[/color][color=#007700];        [/color][color=#0000bb]int n[/color][color=#007700];             [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]printf[/color][color=#007700]([/color][color=#dd0000]"nhap so sinh vien (>0) : "[/color][color=#007700]);        [/color][color=#0000bb]n [/color][color=#007700]= [/color][color=#0000bb]nhap[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        [/color][color=#0000bb]sv [/color][color=#007700]= new [/color][color=#0000bb]string[/color][color=#007700][[/color][color=#0000bb]n[/color][color=#007700]];             for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]n[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]printf[/color][color=#007700]([/color][color=#dd0000]"nhap ten sinh vien " [/color][color=#007700]+ [/color][color=#0000bb]i [/color][color=#007700]+[/color][color=#dd0000]": "[/color][color=#007700]);            [/color][color=#0000bb]sv[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]] = [/color][color=#0000bb]nhap[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();            [/color][color=#0000bb]nhap[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();        }        [/color][color=#0000bb]int item [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700];        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]printf[/color][color=#007700]([/color][color=#dd0000]"nhap ten sinh vien ban can tim: "[/color][color=#007700]);        [/color][color=#0000bb]tim [/color][color=#007700]= [/color][color=#0000bb]nhap[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]n[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++){            if([/color][color=#0000bb]tim[/color][color=#007700].[/color][color=#0000bb]equals[/color][color=#007700]([/color][color=#0000bb]sv[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]])){                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"tim thay sinh vien: " [/color][color=#007700]+ [/color][color=#0000bb]sv[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]);                break;            }            else{                [/color][color=#0000bb]item[/color][color=#007700]+= [/color][color=#0000bb]1[/color][color=#007700];            }        }        if([/color][color=#0000bb]item [/color][color=#007700]== [/color][color=#0000bb]n[/color][color=#007700]){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"khong tim thay ten sinh vien!"[/color][color=#007700]);        }         } }[/color]

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bài 2:

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Mã nguồn PHP:


[color=#000000]
[/color][color=#ff8000]/** to change this license header, choose license headers in project properties.* to change this template file, choose tools | templates* and open the template in the editor.*/ [/color][color=#0000bb]package bai9[/color][color=#007700]; [/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]util[/color][color=#007700].[/color][color=#0000bb]scanner[/color][color=#007700];[/color][color=#ff8000]/**** @author admin*/[/color][color=#007700]public class [/color][color=#0000bb]bai2 [/color][color=#007700]{    public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]) {        [/color][color=#0000bb]scanner input [/color][color=#007700]= new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);        [/color][color=#0000bb]int n[/color][color=#007700];        [/color][color=#0000bb]int arrint[/color][color=#007700][];        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhap so luong p.tu trong day so (>0): "[/color][color=#007700]);        [/color][color=#0000bb]n [/color][color=#007700]= [/color][color=#0000bb]input[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();               [/color][color=#0000bb]arrint [/color][color=#007700]= new [/color][color=#0000bb]int[/color][color=#007700][[/color][color=#0000bb]n[/color][color=#007700]];        for([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]n[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhap gia tri cua phan tu thu "[/color][color=#007700]+ [/color][color=#0000bb]i [/color][color=#007700]+[/color][color=#dd0000]": "[/color][color=#007700]);            [/color][color=#0000bb]arrint[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]] = [/color][color=#0000bb]input[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        }               [/color][color=#0000bb]int item[/color][color=#007700];        for([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< ([/color][color=#0000bb]n[/color][color=#007700]-[/color][color=#0000bb]1[/color][color=#007700]); [/color][color=#0000bb]i[/color][color=#007700]++){            for([/color][color=#0000bb]int j [/color][color=#007700]= [/color][color=#0000bb]i[/color][color=#007700]+[/color][color=#0000bb]1[/color][color=#007700]; [/color][color=#0000bb]j[/color][color=#007700]<[/color][color=#0000bb]n[/color][color=#007700]; [/color][color=#0000bb]j[/color][color=#007700]++){                if([/color][color=#0000bb]arrint[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]] > [/color][color=#0000bb]arrint[/color][color=#007700][[/color][color=#0000bb]j[/color][color=#007700]]){                    [/color][color=#0000bb]item [/color][color=#007700]= [/color][color=#0000bb]arrint[/color][color=#007700][[/color][color=#0000bb]j[/color][color=#007700]];                    [/color][color=#0000bb]arrint[/color][color=#007700][[/color][color=#0000bb]j[/color][color=#007700]] = [/color][color=#0000bb]arrint[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]];                    [/color][color=#0000bb]arrint[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]] = [/color][color=#0000bb]item[/color][color=#007700];                }                                            }                                }        for([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]n[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"arrint"[/color][color=#007700]+[/color][color=#dd0000]"["[/color][color=#007700]+ [/color][color=#0000bb]i [/color][color=#007700]+[/color][color=#dd0000]"] = "[/color][color=#007700]+ [/color][color=#0000bb]arrint[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]);        }           }   } [/color]

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bài 3:

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Mã nguồn PHP:


[color=#000000]
 import java[/color][color=#007700].[/color][color=#0000bb]util[/color][color=#007700].[/color][color=#0000bb]scanner[/color][color=#007700]; public class [/color][color=#0000bb]bai3 [/color][color=#007700]{    public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]) {        [/color][color=#0000bb]scanner nhapdl [/color][color=#007700]= new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);               [/color][color=#0000bb]int [/color][color=#007700][][] [/color][color=#0000bb]a[/color][color=#007700], [/color][color=#0000bb]b[/color][color=#007700];        [/color][color=#0000bb]int h[/color][color=#007700], [/color][color=#0000bb]c[/color][color=#007700];                      [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhap so hang: "[/color][color=#007700]);        [/color][color=#0000bb]h [/color][color=#007700]= [/color][color=#0000bb]nhapdl[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhap so cot: "[/color][color=#007700]);        [/color][color=#0000bb]c [/color][color=#007700]= [/color][color=#0000bb]nhapdl[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();               [/color][color=#0000bb]a [/color][color=#007700]= new [/color][color=#0000bb]int[/color][color=#007700][[/color][color=#0000bb]h[/color][color=#007700]][[/color][color=#0000bb]c[/color][color=#007700]];        [/color][color=#0000bb]b [/color][color=#007700]= new [/color][color=#0000bb]int[/color][color=#007700][[/color][color=#0000bb]h[/color][color=#007700]][[/color][color=#0000bb]c[/color][color=#007700]];               [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhap gia tri cho phan tu a"[/color][color=#007700]);        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]h[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++){            for([/color][color=#0000bb]int j[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]j [/color][color=#007700]< [/color][color=#0000bb]c[/color][color=#007700]; [/color][color=#0000bb]j[/color][color=#007700]++){                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"a[" [/color][color=#007700]+ [/color][color=#0000bb]i [/color][color=#007700]+ [/color][color=#dd0000]"]" [/color][color=#007700]+ [/color][color=#dd0000]"["[/color][color=#007700]+ [/color][color=#0000bb]j [/color][color=#007700]+[/color][color=#dd0000]"]: "[/color][color=#007700]);                [/color][color=#0000bb]a[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]] = [/color][color=#0000bb]nhapdl[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();                           }        }               [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhap gia tri cho phan tu b"[/color][color=#007700]);        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]h[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++){            for([/color][color=#0000bb]int j [/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]j [/color][color=#007700]< [/color][color=#0000bb]c[/color][color=#007700]; [/color][color=#0000bb]j[/color][color=#007700]++){                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"b[" [/color][color=#007700]+ [/color][color=#0000bb]i [/color][color=#007700]+ [/color][color=#dd0000]"]" [/color][color=#007700]+ [/color][color=#dd0000]"["[/color][color=#007700]+ [/color][color=#0000bb]j [/color][color=#007700]+[/color][color=#dd0000]"]: "[/color][color=#007700]);                [/color][color=#0000bb]b[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]] = [/color][color=#0000bb]nhapdl[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();            }        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"
"[/color][color=#007700]);               [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"hien thi ma tran:"[/color][color=#007700]);        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"ma tran 1"[/color][color=#007700]);        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]h[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]" "[/color][color=#007700]);            for([/color][color=#0000bb]int j [/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]j [/color][color=#007700]< [/color][color=#0000bb]c[/color][color=#007700]; [/color][color=#0000bb]j[/color][color=#007700]++){                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]" " [/color][color=#007700]+ [/color][color=#0000bb]a[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]);                           }        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"
"[/color][color=#007700]);        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"ma tran 2"[/color][color=#007700]);        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]h[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]" "[/color][color=#007700]);            for([/color][color=#0000bb]int j [/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]j [/color][color=#007700]< [/color][color=#0000bb]c[/color][color=#007700]; [/color][color=#0000bb]j[/color][color=#007700]++){                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]" " [/color][color=#007700]+ [/color][color=#0000bb]b[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]);                           }        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"
"[/color][color=#007700]);        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"tong hai ma tran"[/color][color=#007700]);        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]h[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]" "[/color][color=#007700]);            for([/color][color=#0000bb]int j [/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]j [/color][color=#007700]< [/color][color=#0000bb]c[/color][color=#007700]; [/color][color=#0000bb]j[/color][color=#007700]++){                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]" " [/color][color=#007700]+ ([/color][color=#0000bb]a[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]] + [/color][color=#0000bb]b[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]));                           }        }    }} [/color]

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**qnguyen1984** · 12-26-2013, 07:00 AM

bai 3<div class="bbcodeblock bbcodequote bbcmspoilerblock">
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Mã nguồn PHP:


[color=#000000]
import java[/color][color=#007700].[/color][color=#0000bb]util[/color][color=#007700].[/color][color=#0000bb]scanner[/color][color=#007700]; [/color][color=#ff8000]/**** @author tran cuong*/[/color][color=#007700]public class [/color][color=#0000bb]bai1 [/color][color=#007700]{    public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]) {        [/color][color=#0000bb]scanner nhapdulieu[/color][color=#007700]=new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);        [/color][color=#0000bb]int hang[/color][color=#007700],[/color][color=#0000bb]cot[/color][color=#007700];        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhap so hang cua ma tran :"[/color][color=#007700]);        [/color][color=#0000bb]hang[/color][color=#007700]=[/color][color=#0000bb]nhapdulieu[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhap so cot cua ma tran :"[/color][color=#007700]);        [/color][color=#0000bb]cot[/color][color=#007700]=[/color][color=#0000bb]nhapdulieu[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        [/color][color=#0000bb]int matran1[/color][color=#007700][][]=new [/color][color=#0000bb]int[/color][color=#007700][[/color][color=#0000bb]hang[/color][color=#007700]][[/color][color=#0000bb]cot[/color][color=#007700]];        [/color][color=#0000bb]int matran2[/color][color=#007700][][]=new [/color][color=#0000bb]int [/color][color=#007700][[/color][color=#0000bb]hang[/color][color=#007700]][[/color][color=#0000bb]cot[/color][color=#007700]];        [/color][color=#0000bb]int matran3[/color][color=#007700][][]=new [/color][color=#0000bb]int [/color][color=#007700][[/color][color=#0000bb]hang[/color][color=#007700]][[/color][color=#0000bb]cot[/color][color=#007700]];        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhap ma tran thu nhat : 
"[/color][color=#007700]);        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]hang[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            for([/color][color=#0000bb]int j[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]<[/color][color=#0000bb]cot[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]++){                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhap ma tran hang "[/color][color=#007700]+([/color][color=#0000bb]i[/color][color=#007700]+[/color][color=#0000bb]1[/color][color=#007700])+([/color][color=#dd0000]" cot "[/color][color=#007700])+([/color][color=#0000bb]j[/color][color=#007700]+[/color][color=#0000bb]1[/color][color=#007700])+([/color][color=#dd0000]":"[/color][color=#007700]));                [/color][color=#0000bb]matran1[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]=[/color][color=#0000bb]nhapdulieu[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();            }        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhap ma tran thu hai : 
"[/color][color=#007700]);        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]hang[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            for([/color][color=#0000bb]int j[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]<[/color][color=#0000bb]cot[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]++){                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhap ma tran hang "[/color][color=#007700]+([/color][color=#0000bb]i[/color][color=#007700]+[/color][color=#0000bb]1[/color][color=#007700])+([/color][color=#dd0000]" cot "[/color][color=#007700])+([/color][color=#0000bb]j[/color][color=#007700]+[/color][color=#0000bb]1[/color][color=#007700])+([/color][color=#dd0000]":"[/color][color=#007700]));                [/color][color=#0000bb]matran2[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]=[/color][color=#0000bb]nhapdulieu[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();            }        }        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]hang[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            for([/color][color=#0000bb]int j[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]<[/color][color=#0000bb]cot[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]++){                [/color][color=#0000bb]matran3[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]=[/color][color=#0000bb]matran1[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]+[/color][color=#0000bb]matran2[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]];                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]" "[/color][color=#007700]+([/color][color=#0000bb]matran3[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]));            }            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]""[/color][color=#007700]);        }      }}[/color]

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**tien_cntt** · 12-26-2013, 07:00 AM

mình mới tham gia bạn nào rảnh vào xem hộ mình với, thanks all!

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Mã nguồn PHP:


[color=#000000]
package sinhvien[/color][color=#007700]; [/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]util[/color][color=#007700].[/color][color=#0000bb]scanner[/color][color=#007700]; public class [/color][color=#0000bb]student [/color][color=#007700]{       public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string [/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]){        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhap vao so sinh vien n="[/color][color=#007700]);        [/color][color=#0000bb]scanner nhap[/color][color=#007700]=new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);        [/color][color=#0000bb]int n[/color][color=#007700]=[/color][color=#0000bb]nhap[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        [/color][color=#0000bb]string [/color][color=#007700][] [/color][color=#0000bb]arrstudent[/color][color=#007700]=new [/color][color=#0000bb]string[/color][color=#007700][[/color][color=#0000bb]n[/color][color=#007700]];        for ([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]n[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhap vao sinh vien thu " [/color][color=#007700]+([/color][color=#0000bb]i[/color][color=#007700]+[/color][color=#0000bb]1[/color][color=#007700])+ [/color][color=#dd0000]" la: "[/color][color=#007700]);            [/color][color=#0000bb]arrstudent[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]=[/color][color=#0000bb]nhap[/color][color=#007700].[/color][color=#0000bb]next[/color][color=#007700]();        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"danh sach sinh vien da nhap 
"[/color][color=#007700]);        for ([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]n[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#0000bb]arrstudent[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]);        }               [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"tim kiem"[/color][color=#007700]);        [/color][color=#0000bb]string str[/color][color=#007700]=[/color][color=#dd0000]""[/color][color=#007700];        [/color][color=#0000bb]int a [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700];        [/color][color=#0000bb]str[/color][color=#007700]=[/color][color=#0000bb]nhap[/color][color=#007700].[/color][color=#0000bb]next[/color][color=#007700]();        for ([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]n[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){        if([/color][color=#0000bb]str[/color][color=#007700].[/color][color=#0000bb]equals[/color][color=#007700]([/color][color=#0000bb]arrstudent[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]))            {            [/color][color=#0000bb]a[/color][color=#007700]=[/color][color=#0000bb]1[/color][color=#007700];            break;            }        else [/color][color=#0000bb]a[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];        }        if([/color][color=#0000bb]a[/color][color=#007700]==[/color][color=#0000bb]1[/color][color=#007700])            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"sinh vien co trong danh sach"[/color][color=#007700]);        else            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"sinh vien khong co trong danh sach"[/color][color=#007700]);           }   }[/color]

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Mã nguồn PHP:


[color=#000000]
package matran[/color][color=#007700]; [/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]util[/color][color=#007700].[/color][color=#0000bb]scanner[/color][color=#007700]; public class [/color][color=#0000bb]matric [/color][color=#007700]{    public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]) {        [/color][color=#0000bb]int[/color][color=#007700][][] [/color][color=#0000bb]arr1 [/color][color=#007700]= new [/color][color=#0000bb]int[/color][color=#007700][[/color][color=#0000bb]2[/color][color=#007700]][[/color][color=#0000bb]3[/color][color=#007700]];        [/color][color=#0000bb]int[/color][color=#007700][][] [/color][color=#0000bb]arr2 [/color][color=#007700]= new [/color][color=#0000bb]int[/color][color=#007700][[/color][color=#0000bb]2[/color][color=#007700]][[/color][color=#0000bb]3[/color][color=#007700]];        [/color][color=#0000bb]scanner nhap [/color][color=#007700]= new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhap vao ma tran thu 1"[/color][color=#007700]);        for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]2[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {            for ([/color][color=#0000bb]int j [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]j [/color][color=#007700]< [/color][color=#0000bb]3[/color][color=#007700]; [/color][color=#0000bb]j[/color][color=#007700]++) {                [/color][color=#0000bb]arr1[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]] = [/color][color=#0000bb]nhap[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();            }        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhap vao ma tran thu 2"[/color][color=#007700]);        for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]2[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {            for ([/color][color=#0000bb]int j [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]j [/color][color=#007700]< [/color][color=#0000bb]3[/color][color=#007700]; [/color][color=#0000bb]j[/color][color=#007700]++) {                [/color][color=#0000bb]arr2[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]] = [/color][color=#0000bb]nhap[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();            }        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"ma tran"[/color][color=#007700]);        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]2[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            for([/color][color=#0000bb]int j[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]<[/color][color=#0000bb]3[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]++){                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#0000bb]arr1[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]+[/color][color=#dd0000]" "[/color][color=#007700]);            }            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]""[/color][color=#007700]);        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"+ ma tran"[/color][color=#007700]);        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]2[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            for([/color][color=#0000bb]int j[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]<[/color][color=#0000bb]3[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]++){                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#0000bb]arr2[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]+[/color][color=#dd0000]" "[/color][color=#007700]);            }            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]""[/color][color=#007700]);        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"= ma tran"[/color][color=#007700]);        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]2[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            for([/color][color=#0000bb]int j[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]<[/color][color=#0000bb]3[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]++){                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#0000bb]arr1[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]+[/color][color=#0000bb]arr2[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]+[/color][color=#dd0000]" "[/color][color=#007700]);            }            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]""[/color][color=#007700]);        }    } }[/color]

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**minhminhdt** · 12-26-2013, 07:00 AM

bai 2<div class="bbcodeblock bbcodequote bbcmspoilerblock">
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Mã nguồn PHP:


[color=#000000]
import java[/color][color=#007700].[/color][color=#0000bb]util[/color][color=#007700].[/color][color=#0000bb]scanner[/color][color=#007700]; [/color][color=#ff8000]/**** @author tran cuong*/[/color][color=#007700]public class [/color][color=#0000bb]bai2 [/color][color=#007700]{    public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]) {        [/color][color=#0000bb]scanner nhapdulieu[/color][color=#007700]=new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);        [/color][color=#0000bb]int a[/color][color=#007700];        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhap so phan tu cua day :"[/color][color=#007700]);        [/color][color=#0000bb]a[/color][color=#007700]=[/color][color=#0000bb]nhapdulieu[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        [/color][color=#0000bb]int m[/color][color=#007700][]=new [/color][color=#0000bb]int[/color][color=#007700][[/color][color=#0000bb]a[/color][color=#007700]];        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]a[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhap so thu "[/color][color=#007700]+([/color][color=#0000bb]i[/color][color=#007700]+[/color][color=#0000bb]1[/color][color=#007700])+([/color][color=#dd0000]":"[/color][color=#007700]));            [/color][color=#0000bb]m[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]=[/color][color=#0000bb]nhapdulieu[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        }        [/color][color=#0000bb]int temple[/color][color=#007700];        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]a[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            for([/color][color=#0000bb]int j[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]<[/color][color=#0000bb]a[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]++){                if([/color][color=#0000bb]m[/color][color=#007700][[/color][color=#0000bb]j[/color][color=#007700]]>[/color][color=#0000bb]m[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]){                    [/color][color=#0000bb]temple[/color][color=#007700]=[/color][color=#0000bb]m[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]];                    [/color][color=#0000bb]m[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]=[/color][color=#0000bb]m[/color][color=#007700][[/color][color=#0000bb]j[/color][color=#007700]];                    [/color][color=#0000bb]m[/color][color=#007700][[/color][color=#0000bb]j[/color][color=#007700]]=[/color][color=#0000bb]temple[/color][color=#007700];                }            }        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"day so sau khi sap xep la :"[/color][color=#007700]);        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]a[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]" "[/color][color=#007700]+([/color][color=#0000bb]m[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]])+([/color][color=#dd0000]" "[/color][color=#007700]));        }      }}[/color]

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**longan1710** · 01-15-2014, 07:00 AM

các bạn cho mình:
ví dụ: nhập tên sinh viên thứ 1: nguyen van a
nhap ten sinh vien thu 2: nguyen ban b
nhập tên sinh viên cân tìm kiếm: a
thì nó báo không có.

p/s: nếu phần nhập tên sinh viên 1: a
nhập tên sinh viên 2: b
thì mình tìm kiếm mới đc....

code mình đây:

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Mã nguồn PHP:


[color=#000000]
package stringprac[/color][color=#007700]; [/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]util[/color][color=#007700].[/color][color=#0000bb]scanner[/color][color=#007700]; public class [/color][color=#0000bb]demo [/color][color=#007700]{    public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string [/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]){        [/color][color=#0000bb]scanner ipt [/color][color=#007700]= new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);        [/color][color=#0000bb]int n[/color][color=#007700], [/color][color=#0000bb]tg[/color][color=#007700];        [/color][color=#ff8000]//int i=0;        [/color][color=#0000bb]int j[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];        [/color][color=#0000bb]int arrint[/color][color=#007700][];               [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"so sinh vien can nhap: "[/color][color=#007700]);        [/color][color=#0000bb]n[/color][color=#007700]=[/color][color=#0000bb]ipt[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        [/color][color=#0000bb]ipt[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();        [/color][color=#0000bb]string [/color][color=#007700][] [/color][color=#0000bb]arraysinhvien[/color][color=#007700];        [/color][color=#0000bb]arraysinhvien [/color][color=#007700]=  new [/color][color=#0000bb]string[/color][color=#007700][[/color][color=#0000bb]n[/color][color=#007700]];        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]n[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]" nhap ten sinh vien thu " [/color][color=#007700]+ [/color][color=#0000bb]i [/color][color=#007700]);            [/color][color=#0000bb]arraysinhvien[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]=[/color][color=#0000bb]ipt[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();                   }               [/color][color=#ff8000]//lay ten sinh vien theo ten        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhap ten sinh vien can tim: "[/color][color=#007700]);        [/color][color=#0000bb]string tsv [/color][color=#007700]= [/color][color=#0000bb]ipt[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();        for([/color][color=#0000bb]int i [/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]arraysinhvien[/color][color=#007700].[/color][color=#0000bb]length[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            if([/color][color=#0000bb]arraysinhvien[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]].[/color][color=#0000bb]equals[/color][color=#007700]([/color][color=#0000bb]tsv[/color][color=#007700])){                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"sinh vien can tim la " [/color][color=#007700]+ [/color][color=#0000bb]tsv[/color][color=#007700]);                [/color][color=#0000bb]j[/color][color=#007700]++;            }            if([/color][color=#0000bb]j[/color][color=#007700]==[/color][color=#0000bb]0[/color][color=#007700]){                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"khong tim thay sinh vien " [/color][color=#007700]+[/color][color=#0000bb]tsv[/color][color=#007700]);            }            else{                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"sinh vien " [/color][color=#007700]+ [/color][color=#0000bb]j [/color][color=#007700]+ [/color][color=#dd0000]"ten" [/color][color=#007700]+ [/color][color=#0000bb]tsv[/color][color=#007700]);            }        }                         }}[/color]

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**thongbdspmh** · 01-16-2014, 07:00 AM

bài 1:
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<div class="bbcm_spoiler_noscript"><blockquote>

Mã nguồn PHP:


[color=#000000]
[/color][color=#007700]public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]) {        [/color][color=#0000bb]scanner nhapdulieu [/color][color=#007700]= new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);        [/color][color=#0000bb]scanner nhapdulieu2 [/color][color=#007700]= new [/color][color=#0000bb]scanner [/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);        [/color][color=#0000bb]scanner nhapdulieu3 [/color][color=#007700]= new [/color][color=#0000bb]scanner [/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);               [/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]arrsinhvien [/color][color=#007700]= new [/color][color=#0000bb]string[/color][color=#007700][[/color][color=#0000bb]100[/color][color=#007700]];        [/color][color=#0000bb]string tensvcantim[/color][color=#007700];        [/color][color=#0000bb]boolean timthay [/color][color=#007700]= [/color][color=#0000bb]false[/color][color=#007700];        [/color][color=#0000bb]int n[/color][color=#007700];        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhap so sinh vien: "[/color][color=#007700]);        [/color][color=#0000bb]n [/color][color=#007700]= [/color][color=#0000bb]nhapdulieu[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]n[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"ten sinh vien thu " [/color][color=#007700]+ ([/color][color=#0000bb]i[/color][color=#007700]+[/color][color=#0000bb]1[/color][color=#007700]) + [/color][color=#dd0000]" :"[/color][color=#007700]);            [/color][color=#0000bb]arrsinhvien[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]] = [/color][color=#0000bb]nhapdulieu2[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhap ten sinh vien can tim:"[/color][color=#007700]);        [/color][color=#0000bb]tensvcantim [/color][color=#007700]= [/color][color=#0000bb]nhapdulieu3[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();               for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]n[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {            if ( [/color][color=#0000bb]arrsinhvien[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]].[/color][color=#0000bb]equals[/color][color=#007700]([/color][color=#0000bb]tensvcantim[/color][color=#007700])) {                            [/color][color=#0000bb]timthay [/color][color=#007700]= [/color][color=#0000bb]true[/color][color=#007700];                            break;                       }        }        if ( [/color][color=#0000bb]timthay [/color][color=#007700])                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"sinh vien: " [/color][color=#007700]+ [/color][color=#0000bb]tensvcantim [/color][color=#007700]+ [/color][color=#dd0000]" co trong danh sach"[/color][color=#007700]);            else                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"sinh vien: " [/color][color=#007700]+ [/color][color=#0000bb]tensvcantim [/color][color=#007700]+ [/color][color=#dd0000]" không co trong danh sach"[/color][color=#007700]);                           }[/color]

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bài 2:
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Mã nguồn PHP:


[color=#000000]
[/color][color=#007700]public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]) {        [/color][color=#0000bb]scanner nhapdulieu [/color][color=#007700]= new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);        [/color][color=#0000bb]scanner nhapdulieu2 [/color][color=#007700]= new [/color][color=#0000bb]scanner [/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);               [/color][color=#0000bb]int[/color][color=#007700][] [/color][color=#0000bb]arr [/color][color=#007700]= new [/color][color=#0000bb]int[/color][color=#007700][[/color][color=#0000bb]20[/color][color=#007700]];        [/color][color=#0000bb]int j[/color][color=#007700],[/color][color=#0000bb]v[/color][color=#007700], [/color][color=#0000bb]n[/color][color=#007700];               [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhập vào n số nguyên:"[/color][color=#007700]);        [/color][color=#0000bb]n [/color][color=#007700]= [/color][color=#0000bb]nhapdulieu[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();               for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]n [/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {            [/color][color=#0000bb]arr[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]] = [/color][color=#0000bb]nhapdulieu2[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        }               [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"mang nhap vao la: "[/color][color=#007700]);        for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]n[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#0000bb]arr[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]] + [/color][color=#dd0000]" "[/color][color=#007700]);        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]""[/color][color=#007700]);        [/color][color=#ff8000]// pp chen        [/color][color=#007700]for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]1[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]n[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {            [/color][color=#0000bb]v  [/color][color=#007700]= [/color][color=#0000bb]arr[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]];            [/color][color=#0000bb]j [/color][color=#007700]= [/color][color=#0000bb]i[/color][color=#007700];            while ( [/color][color=#0000bb]arr[/color][color=#007700][[/color][color=#0000bb]j[/color][color=#007700]-[/color][color=#0000bb]1[/color][color=#007700]] > [/color][color=#0000bb]v[/color][color=#007700]) {                [/color][color=#0000bb]arr[/color][color=#007700][[/color][color=#0000bb]j[/color][color=#007700]] = [/color][color=#0000bb]arr[/color][color=#007700][[/color][color=#0000bb]j[/color][color=#007700]-[/color][color=#0000bb]1[/color][color=#007700]];                [/color][color=#0000bb]j[/color][color=#007700]--;                           }            [/color][color=#0000bb]arr[/color][color=#007700][[/color][color=#0000bb]j[/color][color=#007700]] = [/color][color=#0000bb]v[/color][color=#007700];            }                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"mang sau khi xap sep: "[/color][color=#007700]);        for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]n[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#0000bb]arr[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]] + [/color][color=#dd0000]" "[/color][color=#007700]);        }    }           }[/color]

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bài 3:
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<div class="attribution type"><noscript>spoiler (move your mouse to the spoiler area to reveal the content)</noscript>

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Mã nguồn PHP:


[color=#000000]
[/color][color=#007700]public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]) {        [/color][color=#0000bb]scanner nhapdulieu [/color][color=#007700]= new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);               [/color][color=#0000bb]int[/color][color=#007700][][] [/color][color=#0000bb]matrana [/color][color=#007700]= new [/color][color=#0000bb]int[/color][color=#007700][[/color][color=#0000bb]50[/color][color=#007700]][[/color][color=#0000bb]50[/color][color=#007700]];        [/color][color=#0000bb]int[/color][color=#007700][][] [/color][color=#0000bb]matranb [/color][color=#007700]= new [/color][color=#0000bb]int[/color][color=#007700][[/color][color=#0000bb]50[/color][color=#007700]][[/color][color=#0000bb]50[/color][color=#007700]];        [/color][color=#0000bb]int n[/color][color=#007700],[/color][color=#0000bb]m[/color][color=#007700];        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhap so hang va so cot cua hai ma tran:"[/color][color=#007700]);        [/color][color=#0000bb]n [/color][color=#007700]= [/color][color=#0000bb]nhapdulieu[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        [/color][color=#0000bb]m [/color][color=#007700]= [/color][color=#0000bb]nhapdulieu[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhap ma tran thu nhat"[/color][color=#007700]);        for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]n[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {            for ([/color][color=#0000bb]int j [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]j [/color][color=#007700]< [/color][color=#0000bb]m[/color][color=#007700]; [/color][color=#0000bb]j[/color][color=#007700]++) {                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"a[" [/color][color=#007700]+ ([/color][color=#0000bb]i[/color][color=#007700]+[/color][color=#0000bb]1[/color][color=#007700]) + [/color][color=#dd0000]"][" [/color][color=#007700]+ ([/color][color=#0000bb]j[/color][color=#007700]+[/color][color=#0000bb]1[/color][color=#007700]) +[/color][color=#dd0000]"] = "[/color][color=#007700]);                 [/color][color=#0000bb]matrana[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]] = [/color][color=#0000bb]nhapdulieu[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();            }        }               [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhap ma tran thu hai"[/color][color=#007700]);        for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]n[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {            for ([/color][color=#0000bb]int j [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]j [/color][color=#007700]< [/color][color=#0000bb]m[/color][color=#007700]; [/color][color=#0000bb]j[/color][color=#007700]++) {                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"b[" [/color][color=#007700]+ ([/color][color=#0000bb]i[/color][color=#007700]+[/color][color=#0000bb]1[/color][color=#007700]) + [/color][color=#dd0000]"][" [/color][color=#007700]+ ([/color][color=#0000bb]j[/color][color=#007700]+[/color][color=#0000bb]1[/color][color=#007700]) +[/color][color=#dd0000]"] = "[/color][color=#007700]);                 [/color][color=#0000bb]matranb[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]] = [/color][color=#0000bb]nhapdulieu[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();            }        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"ma tran a:"[/color][color=#007700]);        for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]n[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {            for ([/color][color=#0000bb]int j [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]j [/color][color=#007700]< [/color][color=#0000bb]m[/color][color=#007700]; [/color][color=#0000bb]j[/color][color=#007700]++) {                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#0000bb]matrana[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]] + [/color][color=#dd0000]" "[/color][color=#007700]);            }            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]""[/color][color=#007700]);        }               [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"ma tran b:"[/color][color=#007700]);        for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]n[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {            for ([/color][color=#0000bb]int j [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]j [/color][color=#007700]< [/color][color=#0000bb]m[/color][color=#007700]; [/color][color=#0000bb]j[/color][color=#007700]++) {                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#0000bb]matranb[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]] + [/color][color=#dd0000]" "[/color][color=#007700]);            }            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]""[/color][color=#007700]);        }               [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"tong hai ma tran"[/color][color=#007700]);        for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]n[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {            for ([/color][color=#0000bb]int j [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]j [/color][color=#007700]< [/color][color=#0000bb]m[/color][color=#007700]; [/color][color=#0000bb]j[/color][color=#007700]++) {                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print(([/color][color=#0000bb]matrana[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]] + [/color][color=#0000bb]matranb[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]) + [/color][color=#dd0000]" "[/color][color=#007700]);            }            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]""[/color][color=#007700]);        }    }[/color]

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**ngocnga67** · 02-10-2014, 07:00 AM

mấy cái này thì các bác chơi khó quá. không thấy dạy gì thì biết sao giờ

if(b.equals(a[i]))
dong đấy xuanthu lấy đâu vậy
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Gửi bởi xuanthu

bác nào dảnh xem giúp e nhé!!!
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Mã nguồn PHP:


[color=#000000]
[/color][color=#ff8000]/** to change this template, choose tools | templates* and open the template in the editor.*/[/color][color=#0000bb]package arrdemo[/color][color=#007700];[/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]util[/color][color=#007700].[/color][color=#0000bb]scanner[/color][color=#007700];[/color][color=#ff8000]//số sinh viên nhập từ bàn phím. khai báo 1 mảng gồm danh sách họ tên sinh viên.//tên từng sinh viên nhập từ bàn phím. //sau khi nhập xong, chương trình hỏi nhập tên sinh viên muốn tìm kiếm.//tìm và in ra kết quả là có trong danh sách hay không.[/color][color=#007700]public class [/color][color=#0000bb]bai1 [/color][color=#007700]{    public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]) {            [/color][color=#0000bb]scanner in[/color][color=#007700]=new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);            [/color][color=#0000bb]int i[/color][color=#007700];            [/color][color=#0000bb]boolean kq[/color][color=#007700]=[/color][color=#0000bb]false[/color][color=#007700];          [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhâp số sinh viên : "[/color][color=#007700]);             [/color][color=#0000bb]int n [/color][color=#007700]= [/color][color=#0000bb]in[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();            [/color][color=#0000bb]in[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();            [/color][color=#0000bb]string  a [/color][color=#007700][] = new [/color][color=#0000bb]string [/color][color=#007700][[/color][color=#0000bb]n[/color][color=#007700]];           for( [/color][color=#0000bb]i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]n[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhập sinh viên thứ  : "[/color][color=#007700]+[/color][color=#0000bb]i[/color][color=#007700]);            [/color][color=#0000bb]a[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]=[/color][color=#0000bb]in[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();        }            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhập tên sinh viên muốn tìm : "[/color][color=#007700]);            [/color][color=#0000bb]string b [/color][color=#007700]= [/color][color=#0000bb]in[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();      for( [/color][color=#0000bb]i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]< [/color][color=#0000bb]n[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++) {          if([/color][color=#0000bb]b[/color][color=#007700].[/color][color=#0000bb]equals[/color][color=#007700]([/color][color=#0000bb]a[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]])){              [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"có trong danh sách"[/color][color=#007700]);              [/color][color=#0000bb]kq[/color][color=#007700]=[/color][color=#0000bb]false[/color][color=#007700];          }        }if([/color][color=#0000bb]kq[/color][color=#007700]==[/color][color=#0000bb]false[/color][color=#007700])[/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"khong có trong danh sách"[/color][color=#007700]);         }    } [/color]

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Mã nguồn PHP:


[color=#000000]
[/color][color=#ff8000]/** to change this template, choose tools | templates* and open the template in the editor.*/[/color][color=#0000bb]package arrdemo[/color][color=#007700]; [/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]util[/color][color=#007700].[/color][color=#0000bb]scanner[/color][color=#007700]; [/color][color=#ff8000]//sắp xếp 1 dãy n số nguyên nhập vào từ bàn phím theo thứ tự tăng dần![/color][color=#007700]public class [/color][color=#0000bb]bai2 [/color][color=#007700]{    public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]) {        [/color][color=#0000bb]scanner in[/color][color=#007700]=new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);        [/color][color=#0000bb]int tmp[/color][color=#007700];        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"số phần tử của dãy : "[/color][color=#007700]);        [/color][color=#0000bb]int n[/color][color=#007700]=[/color][color=#0000bb]in[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        [/color][color=#0000bb]int [/color][color=#007700][][/color][color=#0000bb]a [/color][color=#007700]= new [/color][color=#0000bb]int [/color][color=#007700][[/color][color=#0000bb]n[/color][color=#007700]];        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]n[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhập phần từ thứ "[/color][color=#007700]+[/color][color=#0000bb]i[/color][color=#007700]);            [/color][color=#0000bb]a[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]=[/color][color=#0000bb]in[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();      }        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]n[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            for([/color][color=#0000bb]int j[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]<=[/color][color=#0000bb]i[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]++){              if([/color][color=#0000bb]a[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]<[/color][color=#0000bb]a[/color][color=#007700][[/color][color=#0000bb]j[/color][color=#007700]]){                [/color][color=#0000bb]tmp [/color][color=#007700]= [/color][color=#0000bb]a[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]];                [/color][color=#0000bb]a[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]=[/color][color=#0000bb]a[/color][color=#007700][[/color][color=#0000bb]j[/color][color=#007700]];                [/color][color=#0000bb]a[/color][color=#007700][[/color][color=#0000bb]j[/color][color=#007700]]=[/color][color=#0000bb]tmp[/color][color=#007700];              }            }               } for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]n[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]" " [/color][color=#007700]+ [/color][color=#0000bb]a[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]]);        }                 }}[/color]

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bài 3 <div class="bbcodeblock bbcodequote bbcmspoilerblock">
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Mã nguồn PHP:


[color=#000000]
[/color][color=#ff8000]/** to change this template, choose tools | templates* and open the template in the editor.*/  [/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]util[/color][color=#007700].[/color][color=#0000bb]scanner[/color][color=#007700]; [/color][color=#ff8000]/**** @author mrkhoai*/[/color][color=#007700]public class [/color][color=#0000bb]bai3 [/color][color=#007700]{     public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]) {        [/color][color=#0000bb]scanner in[/color][color=#007700]=new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]" nhập số hàng : "[/color][color=#007700]);        [/color][color=#0000bb]int h[/color][color=#007700]=[/color][color=#0000bb]in[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhập số cột : "[/color][color=#007700]);        [/color][color=#0000bb]int c[/color][color=#007700]=[/color][color=#0000bb]in[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        [/color][color=#0000bb]int a1[/color][color=#007700][][]= new [/color][color=#0000bb]int[/color][color=#007700][[/color][color=#0000bb]h[/color][color=#007700]][[/color][color=#0000bb]c[/color][color=#007700]];        [/color][color=#0000bb]int a2[/color][color=#007700][][]= new [/color][color=#0000bb]int [/color][color=#007700][[/color][color=#0000bb]h[/color][color=#007700]][[/color][color=#0000bb]c[/color][color=#007700]];        [/color][color=#0000bb]int a3[/color][color=#007700][][]=new [/color][color=#0000bb]int [/color][color=#007700][[/color][color=#0000bb]h[/color][color=#007700]][[/color][color=#0000bb]c[/color][color=#007700]];        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhập ma trận a1"[/color][color=#007700]);        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]h[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            for([/color][color=#0000bb]int j[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]<[/color][color=#0000bb]c[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]++){              [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhập a1["[/color][color=#007700]+[/color][color=#0000bb]i[/color][color=#007700]+[/color][color=#dd0000]"]"[/color][color=#007700]+[/color][color=#dd0000]"["[/color][color=#007700]+[/color][color=#0000bb]j[/color][color=#007700]+[/color][color=#dd0000]"]"[/color][color=#007700]);              [/color][color=#0000bb]a1[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]=[/color][color=#0000bb]in[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();            }        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhập ma trận a2"[/color][color=#007700]);        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]h[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            for([/color][color=#0000bb]int j[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]<[/color][color=#0000bb]c[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]++){                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"nhập a1["[/color][color=#007700]+[/color][color=#0000bb]i[/color][color=#007700]+[/color][color=#dd0000]"]"[/color][color=#007700]+[/color][color=#dd0000]"["[/color][color=#007700]+[/color][color=#0000bb]j[/color][color=#007700]+[/color][color=#dd0000]"]"[/color][color=#007700]);              [/color][color=#0000bb]a2[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]=[/color][color=#0000bb]in[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();            }        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"ma trận a1 là : "[/color][color=#007700]);        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]h[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            for([/color][color=#0000bb]int j[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]<[/color][color=#0000bb]c[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]++){                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"  "[/color][color=#007700]+[/color][color=#0000bb]a1[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]);            }            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]""[/color][color=#007700]);        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"ma trận a2 là : "[/color][color=#007700]);        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]h[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            for([/color][color=#0000bb]int j[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]<[/color][color=#0000bb]c[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]++){                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]" "[/color][color=#007700]+[/color][color=#0000bb]a2[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]);            }            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]""[/color][color=#007700]);        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"tổng 2 ma trận là :"[/color][color=#007700]);        for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]h[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++){            for([/color][color=#0000bb]int j[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]<[/color][color=#0000bb]c[/color][color=#007700];[/color][color=#0000bb]j[/color][color=#007700]++){                [/color][color=#0000bb]a3[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]=[/color][color=#0000bb]a1[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]+[/color][color=#0000bb]a2[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]];                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]" "[/color][color=#007700]+[/color][color=#0000bb]a3[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][[/color][color=#0000bb]j[/color][color=#007700]]);            }[/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]""[/color][color=#007700]);        }      }    }   [/color]

</blockquote></div>
</div>
</div>

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