Bài 4: Toán tử và biểu thức, hàm toán học trong Java

**xvietsao** · 08-15-2013, 07:00 AM

Mã nguồn PHP:


[color=#000000]
code[/color]

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public class baitap1 {
public static void main(string[]args){
int a, b ,c;
a=9;
b=17;
c=15;
system.out.println("a/2="+a/2);
system.out.println("b/2="+b/2);
system.out.println("c/2="+c/2);
system.out.println("a%3="+a%3);
system.out.println("b%3="+b%3);
system.out.println("c%3="+c%3);
system.out.println("
");
a++;
b++;
c++;
system.out.println("gia tri moi cua a la :"+a);
system.out.println("gia tri moi cua b la:"+b);
system.out.println("gia tri moi cua c la:"+c);
}
}

**bong88vn123** · 08-20-2013, 07:00 AM

Gửi bởi thuy_ja

nộp bài ^^
bai3: loai hoai..du kieu moi xong phan tinh goc...hieu thuan toán nhưng chưa hiểu cái thư viện math để tính cos :-(

bạn tham khảo bài của mấy bạn trên đấy! có nhiều bạn đã làm đúng, bên trang 1

**24hpro** · 08-20-2013, 07:00 AM

sao mình chạy mãi mà vẫn lỗi chỗ tính góc vậy, mọi người xem hộ mình xem sai chỗ nào với

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Mã nguồn PHP:


[color=#000000]
[/color][color=#007700][[/color][color=#0000bb]code[/color][color=#007700]]public class [/color][color=#0000bb]bai4 [/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=#ff8000]// todo code application logic here        [/color][color=#0000bb]int a [/color][color=#007700]= [/color][color=#0000bb]3[/color][color=#007700], [/color][color=#0000bb]b [/color][color=#007700]= [/color][color=#0000bb]4[/color][color=#007700], [/color][color=#0000bb]c [/color][color=#007700]= [/color][color=#0000bb]5[/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]"phần nguyên khi chia các số cho 2 lần lượt là: " [/color][color=#007700]+ [/color][color=#0000bb]a[/color][color=#007700]/[/color][color=#0000bb]2 [/color][color=#007700]+ [/color][color=#dd0000]", "                [/color][color=#007700]+ [/color][color=#0000bb]b[/color][color=#007700]/[/color][color=#0000bb]2 [/color][color=#007700]+ [/color][color=#dd0000]", " [/color][color=#007700]+ [/color][color=#0000bb]c[/color][color=#007700]/[/color][color=#0000bb]2[/color][color=#007700]);        [/color][color=#0000bb]a[/color][color=#007700]++;        [/color][color=#0000bb]b[/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]"giá trị mới sau khi tăng 3 biến lên 1: "                [/color][color=#007700]+ [/color][color=#0000bb]a [/color][color=#007700]+ [/color][color=#dd0000]", " [/color][color=#007700]+ [/color][color=#0000bb]b [/color][color=#007700]+ [/color][color=#dd0000]", " [/color][color=#007700]+ [/color][color=#0000bb]c[/color][color=#007700]);        [/color][color=#0000bb]a[/color][color=#007700]--;        [/color][color=#0000bb]b[/color][color=#007700]--;        [/color][color=#0000bb]c[/color][color=#007700]--;        [/color][color=#0000bb]float x[/color][color=#007700];        [/color][color=#0000bb]x [/color][color=#007700]= ((float)([/color][color=#0000bb]8[/color][color=#007700]*[/color][color=#0000bb]c [/color][color=#007700]- [/color][color=#0000bb]b[/color][color=#007700]))/([/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]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]"kết quả phép tính khi chưa ép kiểu là " [/color][color=#007700]+ [/color][color=#0000bb]x[/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]"sau khi ép kiểu: " [/color][color=#007700]+ (int)[/color][color=#0000bb]x[/color][color=#007700]);        [/color][color=#0000bb]float p [/color][color=#007700]= ((float)([/color][color=#0000bb]a [/color][color=#007700]+ [/color][color=#0000bb]b [/color][color=#007700]+ [/color][color=#0000bb]c[/color][color=#007700]))/[/color][color=#0000bb]2[/color][color=#007700];        [/color][color=#0000bb]double s[/color][color=#007700];        [/color][color=#0000bb]s [/color][color=#007700]= [/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]sqrt[/color][color=#007700]([/color][color=#0000bb]p[/color][color=#007700]*([/color][color=#0000bb]p[/color][color=#007700]-[/color][color=#0000bb]a[/color][color=#007700])*([/color][color=#0000bb]p[/color][color=#007700]-[/color][color=#0000bb]b[/color][color=#007700])*([/color][color=#0000bb]p[/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]"diện tích tam giác là " [/color][color=#007700]+ [/color][color=#0000bb]s[/color][color=#007700]);        [/color][color=#0000bb]double a [/color][color=#007700]= [/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]acos[/color][color=#007700](([/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]a [/color][color=#007700]+ [/color][color=#0000bb]b[/color][color=#007700]*[/color][color=#0000bb]b [/color][color=#007700]- [/color][color=#0000bb]c[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700])/([/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]b[/color][color=#007700]));        [/color][color=#0000bb]double b [/color][color=#007700]= [/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]acos[/color][color=#007700](([/color][color=#0000bb]b[/color][color=#007700]*[/color][color=#0000bb]b [/color][color=#007700]+ [/color][color=#0000bb]c[/color][color=#007700]*[/color][color=#0000bb]c [/color][color=#007700]- [/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]a[/color][color=#007700])/([/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]b[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700]));        [/color][color=#0000bb]double c [/color][color=#007700]= [/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]acos[/color][color=#007700](([/color][color=#0000bb]c[/color][color=#007700]*[/color][color=#0000bb]c [/color][color=#007700]+ [/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]a [/color][color=#007700]- [/color][color=#0000bb]b[/color][color=#007700]*[/color][color=#0000bb]b[/color][color=#007700])/([/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]a[/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]"các góc của tam giác là "                [/color][color=#007700]+ [/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]todegrees[/color][color=#007700]([/color][color=#0000bb]a[/color][color=#007700]) + [/color][color=#dd0000]" độ,\t" [/color][color=#007700]+ [/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]todegrees[/color][color=#007700]([/color][color=#0000bb]b[/color][color=#007700]) +[/color][color=#dd0000]" độ,\t" [/color][color=#007700]+[/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]todegrees[/color][color=#007700]([/color][color=#0000bb]c[/color][color=#007700]) + [/color][color=#dd0000]" độ"[/color][color=#007700]);    }}[/[/color][color=#0000bb]code[/color][color=#007700]][/color]

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**linkipro1** · 09-01-2013, 07:00 AM

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Mã nguồn PHP:


[color=#000000]
package structuredemo[/color][color=#007700]; public class [/color][color=#0000bb]unit1 [/color][color=#007700]{public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string args [/color][color=#007700][]){ [/color][color=#0000bb]int a[/color][color=#007700]=[/color][color=#0000bb]3[/color][color=#007700], [/color][color=#0000bb]b[/color][color=#007700]=[/color][color=#0000bb]4[/color][color=#007700], [/color][color=#0000bb]c[/color][color=#007700]=[/color][color=#0000bb]5[/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]"unit1: (a,b,c)/2= "[/color][color=#007700]+([/color][color=#0000bb]a[/color][color=#007700]/[/color][color=#0000bb]2[/color][color=#007700])+[/color][color=#dd0000]": "[/color][color=#007700]+([/color][color=#0000bb]b[/color][color=#007700]/[/color][color=#0000bb]2[/color][color=#007700])+[/color][color=#dd0000]": "[/color][color=#007700]+([/color][color=#0000bb]c[/color][color=#007700]/[/color][color=#0000bb]2[/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]"unit1: (a,b,c)%3= "[/color][color=#007700]+([/color][color=#0000bb]a[/color][color=#007700]%[/color][color=#0000bb]3[/color][color=#007700])+[/color][color=#dd0000]": "[/color][color=#007700]+([/color][color=#0000bb]b[/color][color=#007700]%[/color][color=#0000bb]3[/color][color=#007700])+[/color][color=#dd0000]": "[/color][color=#007700]+([/color][color=#0000bb]c[/color][color=#007700]%[/color][color=#0000bb]3[/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]"unit1: going up 1:" [/color][color=#007700]+(++[/color][color=#0000bb]a[/color][color=#007700])+ [/color][color=#dd0000]", " [/color][color=#007700]+(++[/color][color=#0000bb]b[/color][color=#007700])+ [/color][color=#dd0000]", " [/color][color=#007700]+(++[/color][color=#0000bb]c[/color][color=#007700])); [/color][color=#0000bb]unit out [/color][color=#007700]= new [/color][color=#0000bb]unit[/color][color=#007700]();[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]unit2[/color][color=#007700]([/color][color=#0000bb]3[/color][color=#007700], [/color][color=#0000bb]4[/color][color=#007700], [/color][color=#0000bb]5[/color][color=#007700]);[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]unit3[/color][color=#007700]([/color][color=#0000bb]4[/color][color=#007700], [/color][color=#0000bb]5[/color][color=#007700], [/color][color=#0000bb]6[/color][color=#007700]); }[/color][color=#ff8000]//end the main.[/color][color=#007700]}[/color][color=#ff8000]// end the class dohomework. [/color][color=#007700]class [/color][color=#0000bb]unit [/color][color=#007700]{ public static [/color][color=#0000bb]void unit2[/color][color=#007700]([/color][color=#0000bb]float a[/color][color=#007700], [/color][color=#0000bb]float b[/color][color=#007700], [/color][color=#0000bb]float c[/color][color=#007700]) {[/color][color=#0000bb]float x[/color][color=#007700]; [/color][color=#ff8000]// 2ax+b=8c.[/color][color=#007700]if([/color][color=#0000bb]a[/color][color=#007700]!=[/color][color=#0000bb]0[/color][color=#007700]) {[/color][color=#0000bb]x [/color][color=#007700]= ([/color][color=#0000bb]8[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700]-[/color][color=#0000bb]b[/color][color=#007700])/([/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]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]"unit2: x="[/color][color=#007700]+((int) [/color][color=#0000bb]x [/color][color=#007700]) );}else [/color][color=#ff8000]// a==0;[/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"vo nghiem chang han!"[/color][color=#007700]);}[/color][color=#ff8000]//end the method unit2.. [/color][color=#007700]public static [/color][color=#0000bb]void unit3[/color][color=#007700]([/color][color=#0000bb]float a[/color][color=#007700], [/color][color=#0000bb]float b[/color][color=#007700], [/color][color=#0000bb]float c[/color][color=#007700]){ [/color][color=#0000bb]float p [/color][color=#007700]= ([/color][color=#0000bb]a[/color][color=#007700]+[/color][color=#0000bb]b[/color][color=#007700]+[/color][color=#0000bb]c[/color][color=#007700])/[/color][color=#0000bb]2[/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]"unit3: dientich= "[/color][color=#007700]+([/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]sqrt[/color][color=#007700]( [/color][color=#0000bb]p[/color][color=#007700]*([/color][color=#0000bb]p[/color][color=#007700]-[/color][color=#0000bb]a[/color][color=#007700])*([/color][color=#0000bb]p[/color][color=#007700]-[/color][color=#0000bb]b[/color][color=#007700])*([/color][color=#0000bb]p[/color][color=#007700]-[/color][color=#0000bb]c[/color][color=#007700]) ) ) );[/color][color=#0000bb]float a[/color][color=#007700]=([/color][color=#0000bb]b[/color][color=#007700]*[/color][color=#0000bb]b[/color][color=#007700]+[/color][color=#0000bb]c[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700]-[/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]a[/color][color=#007700])/([/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]b[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700]);[/color][color=#0000bb]float b[/color][color=#007700]=([/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]a[/color][color=#007700]+[/color][color=#0000bb]c[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700]-[/color][color=#0000bb]b[/color][color=#007700]*[/color][color=#0000bb]b[/color][color=#007700])/([/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700]);[/color][color=#0000bb]float c[/color][color=#007700]=([/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]a[/color][color=#007700]+[/color][color=#0000bb]b[/color][color=#007700]*[/color][color=#0000bb]b[/color][color=#007700]-[/color][color=#0000bb]c[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700])/([/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]b[/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]"unit3: ketqua="[/color][color=#007700]+([/color][color=#0000bb]a[/color][color=#007700])+ [/color][color=#dd0000]", "[/color][color=#007700]+([/color][color=#0000bb]b[/color][color=#007700])+ [/color][color=#dd0000]", " [/color][color=#007700]+([/color][color=#0000bb]c[/color][color=#007700]));}[/color][color=#ff8000]//end the method unit3.[/color][color=#007700]}[/color][color=#ff8000]//end the class unit2.[/color]

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Gửi bởi hohoaikiet

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Mã nguồn PHP:


[color=#000000]
package structuredemo[/color][color=#007700]; public class [/color][color=#0000bb]unit1 [/color][color=#007700]{public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string args [/color][color=#007700][]){ [/color][color=#0000bb]int a[/color][color=#007700]=[/color][color=#0000bb]3[/color][color=#007700], [/color][color=#0000bb]b[/color][color=#007700]=[/color][color=#0000bb]4[/color][color=#007700], [/color][color=#0000bb]c[/color][color=#007700]=[/color][color=#0000bb]5[/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]"unit1: (a,b,c)/2= "[/color][color=#007700]+([/color][color=#0000bb]a[/color][color=#007700]/[/color][color=#0000bb]2[/color][color=#007700])+[/color][color=#dd0000]": "[/color][color=#007700]+([/color][color=#0000bb]b[/color][color=#007700]/[/color][color=#0000bb]2[/color][color=#007700])+[/color][color=#dd0000]": "[/color][color=#007700]+([/color][color=#0000bb]c[/color][color=#007700]/[/color][color=#0000bb]2[/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]"unit1: (a,b,c)%3= "[/color][color=#007700]+([/color][color=#0000bb]a[/color][color=#007700]%[/color][color=#0000bb]3[/color][color=#007700])+[/color][color=#dd0000]": "[/color][color=#007700]+([/color][color=#0000bb]b[/color][color=#007700]%[/color][color=#0000bb]3[/color][color=#007700])+[/color][color=#dd0000]": "[/color][color=#007700]+([/color][color=#0000bb]c[/color][color=#007700]%[/color][color=#0000bb]3[/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]"unit1: going up 1:" [/color][color=#007700]+(++[/color][color=#0000bb]a[/color][color=#007700])+ [/color][color=#dd0000]", " [/color][color=#007700]+(++[/color][color=#0000bb]b[/color][color=#007700])+ [/color][color=#dd0000]", " [/color][color=#007700]+(++[/color][color=#0000bb]c[/color][color=#007700])); [/color][color=#0000bb]unit out [/color][color=#007700]= new [/color][color=#0000bb]unit[/color][color=#007700]();[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]unit2[/color][color=#007700]([/color][color=#0000bb]3[/color][color=#007700], [/color][color=#0000bb]4[/color][color=#007700], [/color][color=#0000bb]5[/color][color=#007700]);[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]unit3[/color][color=#007700]([/color][color=#0000bb]4[/color][color=#007700], [/color][color=#0000bb]5[/color][color=#007700], [/color][color=#0000bb]6[/color][color=#007700]); }[/color][color=#ff8000]//end the main.[/color][color=#007700]}[/color][color=#ff8000]// end the class dohomework. [/color][color=#007700]class [/color][color=#0000bb]unit [/color][color=#007700]{ public static [/color][color=#0000bb]void unit2[/color][color=#007700]([/color][color=#0000bb]float a[/color][color=#007700], [/color][color=#0000bb]float b[/color][color=#007700], [/color][color=#0000bb]float c[/color][color=#007700]) {[/color][color=#0000bb]float x[/color][color=#007700]; [/color][color=#ff8000]// 2ax+b=8c.[/color][color=#007700]if([/color][color=#0000bb]a[/color][color=#007700]!=[/color][color=#0000bb]0[/color][color=#007700]) {[/color][color=#0000bb]x [/color][color=#007700]= ([/color][color=#0000bb]8[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700]-[/color][color=#0000bb]b[/color][color=#007700])/([/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]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]"unit2: x="[/color][color=#007700]+((int) [/color][color=#0000bb]x [/color][color=#007700]) );}else [/color][color=#ff8000]// a==0;[/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"vo nghiem chang han!"[/color][color=#007700]);}[/color][color=#ff8000]//end the method unit2.. [/color][color=#007700]public static [/color][color=#0000bb]void unit3[/color][color=#007700]([/color][color=#0000bb]float a[/color][color=#007700], [/color][color=#0000bb]float b[/color][color=#007700], [/color][color=#0000bb]float c[/color][color=#007700]){ [/color][color=#0000bb]float p [/color][color=#007700]= ([/color][color=#0000bb]a[/color][color=#007700]+[/color][color=#0000bb]b[/color][color=#007700]+[/color][color=#0000bb]c[/color][color=#007700])/[/color][color=#0000bb]2[/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]"unit3: dientich= "[/color][color=#007700]+([/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]sqrt[/color][color=#007700]( [/color][color=#0000bb]p[/color][color=#007700]*([/color][color=#0000bb]p[/color][color=#007700]-[/color][color=#0000bb]a[/color][color=#007700])*([/color][color=#0000bb]p[/color][color=#007700]-[/color][color=#0000bb]b[/color][color=#007700])*([/color][color=#0000bb]p[/color][color=#007700]-[/color][color=#0000bb]c[/color][color=#007700]) ) ) );[/color][color=#0000bb]float a[/color][color=#007700]=([/color][color=#0000bb]b[/color][color=#007700]*[/color][color=#0000bb]b[/color][color=#007700]+[/color][color=#0000bb]c[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700]-[/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]a[/color][color=#007700])/([/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]b[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700]);[/color][color=#0000bb]float b[/color][color=#007700]=([/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]a[/color][color=#007700]+[/color][color=#0000bb]c[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700]-[/color][color=#0000bb]b[/color][color=#007700]*[/color][color=#0000bb]b[/color][color=#007700])/([/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700]);[/color][color=#0000bb]float c[/color][color=#007700]=([/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]a[/color][color=#007700]+[/color][color=#0000bb]b[/color][color=#007700]*[/color][color=#0000bb]b[/color][color=#007700]-[/color][color=#0000bb]c[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700])/([/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]b[/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]"unit3: ketqua="[/color][color=#007700]+([/color][color=#0000bb]a[/color][color=#007700])+ [/color][color=#dd0000]", "[/color][color=#007700]+([/color][color=#0000bb]b[/color][color=#007700])+ [/color][color=#dd0000]", " [/color][color=#007700]+([/color][color=#0000bb]c[/color][color=#007700]));}[/color][color=#ff8000]//end the method unit3.[/color][color=#007700]}[/color][color=#ff8000]//end the class unit2.[/color]

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

trót nghịch với mấy đoạn code. hề hề! cũng vui.

**xebabysportvn123** · 09-07-2013, 07:00 AM

bai 1
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Mã:

public static void main(string[]args){
        int a,b,c;
        a=3;
        b=4;
        c=5;
        system.out.println("phan nguyen khi chia "+a+"/2=" +(a/2));
        system.out.println("phan nguyen khi chia "+b+"/2=" +(b/2));
        system.out.println("phan nguyen khi chia "+c+"/2=" +(c/2));
        system.out.println("phan du khi chia "+a+"/3=" +(a%3));
        system.out.println("phan du khi chia "+b+"/3=" +(b%3));
        system.out.println("phan du khi chia "+c+"/3=" +(c%3));
        ++a;
        ++b;
        ++c;
        system.out.println("gia tri a "+a);
        system.out.println("gia tri b "+b);
        system.out.println("gia tri c "+c);
    }

</blockquote></div>
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**ngiensinek** · 09-07-2013, 07:00 AM

bai 2
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Mã:

public static void main(string[]args){
        float a,b,c,x;
        a=3;
        b=4;
        c=5;
        x=(8*c-b)/(2*a);
        system.out.println("float x="+x);
        system.out.println("int x="+(int)x);
 
    }

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

**hachihachi0807** · 09-07-2013, 07:00 AM

bai 03
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Mã:

    public static void main(string[]args){
        float a,b,c,s;
        a=3;
        b=4;
        c=5;
        float p;
        p=(a+b+c)/2;
        s=(float) math.sqrt(p*(p-a)*(p-b)*(p-c));
        system.out.println("dien tich ="+s);
        float a,b,c;
        a=(float)math.asin((2*s)/(b*c));
        b=(float)math.asin((2*s)/(a*c));
        c=(float)math.asin((2*s)/(a*b));
        system.out.println("goc a="+(float)(a*180)/math.pi);
        system.out.println("goc b="+(float)(b*180)/math.pi);
        system.out.println("goc c="+(float)(c*180)/math.pi);
    }

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

**thuhongnt** · 09-07-2013, 07:00 AM

câu 1:
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Mã nguồn PHP:


[color=#000000]
[/color][color=#007700]public class [/color][color=#0000bb]so1 [/color][color=#007700]{    public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string [/color][color=#007700][] [/color][color=#0000bb]agrs[/color][color=#007700]) {        [/color][color=#0000bb]int a [/color][color=#007700]=[/color][color=#0000bb]3[/color][color=#007700];        [/color][color=#0000bb]int b[/color][color=#007700]=[/color][color=#0000bb]4[/color][color=#007700];        [/color][color=#0000bb]int c[/color][color=#007700]=[/color][color=#0000bb]5[/color][color=#007700];        [/color][color=#0000bb]int d[/color][color=#007700]= (int) [/color][color=#0000bb]a[/color][color=#007700]/[/color][color=#0000bb]2[/color][color=#007700];        [/color][color=#0000bb]int e[/color][color=#007700]= (int) [/color][color=#0000bb]b[/color][color=#007700]/[/color][color=#0000bb]2[/color][color=#007700];        [/color][color=#0000bb]int f[/color][color=#007700]= (int) [/color][color=#0000bb]c[/color][color=#007700]/[/color][color=#0000bb]2[/color][color=#007700];        [/color][color=#0000bb]int du1[/color][color=#007700]= [/color][color=#0000bb]a[/color][color=#007700]%[/color][color=#0000bb]2[/color][color=#007700];        [/color][color=#0000bb]int du2[/color][color=#007700]= [/color][color=#0000bb]b[/color][color=#007700]%[/color][color=#0000bb]2[/color][color=#007700];        [/color][color=#0000bb]int du3[/color][color=#007700]= [/color][color=#0000bb]c[/color][color=#007700]%[/color][color=#0000bb]2[/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]"phân nguyên phép chia a/2: "[/color][color=#007700]+[/color][color=#0000bb]d[/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]"phân nguyên phép chia b/2: "[/color][color=#007700]+[/color][color=#0000bb]e[/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]"phân nguyên phép chia c/2: "[/color][color=#007700]+[/color][color=#0000bb]f[/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]"phân dư phép chia a/2: "[/color][color=#007700]+[/color][color=#0000bb]du1[/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]"phân dư phép chia b/2: "[/color][color=#007700]+[/color][color=#0000bb]du2[/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]"phân dư phép chia c/2: "[/color][color=#007700]+[/color][color=#0000bb]du3[/color][color=#007700]);[/color][color=#0000bb]a[/color][color=#007700]++;[/color][color=#0000bb]b[/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]"a = "[/color][color=#007700]+[/color][color=#0000bb]a [/color][color=#007700]+[/color][color=#dd0000]" b= "[/color][color=#007700]+[/color][color=#0000bb]b[/color][color=#007700]+[/color][color=#dd0000]" c= "[/color][color=#007700]+[/color][color=#0000bb]c[/color][color=#007700]);    }}[/color]

</blockquote></div>
</div>
</div>
câu 2:
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Mã nguồn PHP:


[color=#000000]
[/color][color=#007700]public class [/color][color=#0000bb]so2 [/color][color=#007700]{    public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]agrs[/color][color=#007700]) {         [/color][color=#0000bb]float a [/color][color=#007700]= [/color][color=#0000bb]3[/color][color=#007700];        [/color][color=#0000bb]float b [/color][color=#007700]= [/color][color=#0000bb]2[/color][color=#007700];        [/color][color=#0000bb]float c [/color][color=#007700]= [/color][color=#0000bb]5[/color][color=#007700];        [/color][color=#0000bb]float x [/color][color=#007700]= ([/color][color=#0000bb]8 [/color][color=#007700]* [/color][color=#0000bb]c [/color][color=#007700]- [/color][color=#0000bb]b[/color][color=#007700]) / ([/color][color=#0000bb]2 [/color][color=#007700]* [/color][color=#0000bb]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]"nghiêm của pt 2ax+b=8c là: x= " [/color][color=#007700]+ [/color][color=#0000bb]x[/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]"x được ép kiểu về số nguyên : x = " [/color][color=#007700]+ (int) [/color][color=#0000bb]x[/color][color=#007700]);    } }[/color]

</blockquote></div>
</div>
</div>
câu 3:
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Mã nguồn PHP:


[color=#000000]
[/color][color=#007700]public class [/color][color=#0000bb]so3 [/color][color=#007700]{public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][][/color][color=#0000bb]agrs[/color][color=#007700]) {    [/color][color=#0000bb]float a[/color][color=#007700]=[/color][color=#0000bb]3[/color][color=#007700];    [/color][color=#0000bb]float b[/color][color=#007700]=[/color][color=#0000bb]4[/color][color=#007700];    [/color][color=#0000bb]float c[/color][color=#007700]=[/color][color=#0000bb]5[/color][color=#007700];    [/color][color=#0000bb]float p[/color][color=#007700]=([/color][color=#0000bb]a[/color][color=#007700]+[/color][color=#0000bb]b[/color][color=#007700]+[/color][color=#0000bb]c[/color][color=#007700])/[/color][color=#0000bb]2[/color][color=#007700];    [/color][color=#0000bb]double s[/color][color=#007700]= [/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]sqrt[/color][color=#007700]([/color][color=#0000bb]p[/color][color=#007700]*([/color][color=#0000bb]p[/color][color=#007700]-[/color][color=#0000bb]a[/color][color=#007700])*([/color][color=#0000bb]p[/color][color=#007700]-[/color][color=#0000bb]b[/color][color=#007700])*([/color][color=#0000bb]p[/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]"dien tich tam giac la s= "[/color][color=#007700]+[/color][color=#0000bb]s[/color][color=#007700]);    [/color][color=#0000bb]double a[/color][color=#007700]=[/color][color=#0000bb]180[/color][color=#007700]*([/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]asin[/color][color=#007700]([/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]s[/color][color=#007700]/([/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]b[/color][color=#007700])))/[/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]pi[/color][color=#007700];    [/color][color=#0000bb]double b[/color][color=#007700]=[/color][color=#0000bb]180[/color][color=#007700]*([/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]asin[/color][color=#007700]([/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]s[/color][color=#007700]/([/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700])))/[/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]pi[/color][color=#007700];    [/color][color=#0000bb]double c[/color][color=#007700]=[/color][color=#0000bb]180[/color][color=#007700]*([/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]asin[/color][color=#007700]([/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]s[/color][color=#007700]/([/color][color=#0000bb]c[/color][color=#007700]*[/color][color=#0000bb]b[/color][color=#007700])))/[/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]pi[/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]"3 goc tam giac la :" [/color][color=#007700]+[/color][color=#0000bb]a [/color][color=#007700]+[/color][color=#dd0000]" "[/color][color=#007700]+[/color][color=#0000bb]b[/color][color=#007700]+[/color][color=#dd0000]" "[/color][color=#007700]+[/color][color=#0000bb]c[/color][color=#007700]);   }}[/color]

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

**trananhanh1** · 09-09-2013, 07:00 AM

nộp bài:

bài 1:
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Mã nguồn PHP:


[color=#000000]
package bai1[/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]int a[/color][color=#007700]=[/color][color=#0000bb]3[/color][color=#007700], [/color][color=#0000bb]b[/color][color=#007700]=[/color][color=#0000bb]4[/color][color=#007700], [/color][color=#0000bb]c[/color][color=#007700]=[/color][color=#0000bb]5[/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]"phần nguyên khi chia cho 2 của a, b, c lần lượt là: " [/color][color=#007700]+([/color][color=#0000bb]a[/color][color=#007700]/[/color][color=#0000bb]2[/color][color=#007700])+[/color][color=#dd0000]", " [/color][color=#007700]+([/color][color=#0000bb]b[/color][color=#007700]/[/color][color=#0000bb]2[/color][color=#007700])+[/color][color=#dd0000]", "  [/color][color=#007700]+([/color][color=#0000bb]c[/color][color=#007700]/[/color][color=#0000bb]2[/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]"phần dư khi chia cho 3 của a, b, c lần lượt là: " [/color][color=#007700]+([/color][color=#0000bb]a[/color][color=#007700]%[/color][color=#0000bb]3[/color][color=#007700])+[/color][color=#dd0000]", " [/color][color=#007700]+([/color][color=#0000bb]b[/color][color=#007700]%[/color][color=#0000bb]3[/color][color=#007700])+[/color][color=#dd0000]", " [/color][color=#007700]+([/color][color=#0000bb]c[/color][color=#007700]%[/color][color=#0000bb]3[/color][color=#007700]));        [/color][color=#0000bb]a[/color][color=#007700]++; [/color][color=#0000bb]b[/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]"giá trị a, b, c sau khi tăng: " [/color][color=#007700]+[/color][color=#0000bb]a[/color][color=#007700]+[/color][color=#dd0000]", "[/color][color=#007700]+[/color][color=#0000bb]b[/color][color=#007700]+[/color][color=#dd0000]", " [/color][color=#007700]+[/color][color=#0000bb]c[/color][color=#007700]);    }}[/color]

</blockquote></div>
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bài 2
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Mã nguồn PHP:


[color=#000000]
package bai2[/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]float a [/color][color=#007700]=[/color][color=#0000bb]2[/color][color=#007700], [/color][color=#0000bb]b[/color][color=#007700]=[/color][color=#0000bb]3[/color][color=#007700], [/color][color=#0000bb]c[/color][color=#007700]=[/color][color=#0000bb]4[/color][color=#007700], [/color][color=#0000bb]x[/color][color=#007700];        [/color][color=#0000bb]int ex[/color][color=#007700];        [/color][color=#0000bb]x [/color][color=#007700]= ([/color][color=#0000bb]8[/color][color=#007700]*[/color][color=#0000bb]c [/color][color=#007700]- [/color][color=#0000bb]b[/color][color=#007700])/([/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]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]"giá trị x là: "[/color][color=#007700]+[/color][color=#0000bb]x[/color][color=#007700]);        [/color][color=#0000bb]ex [/color][color=#007700]=  (int) [/color][color=#0000bb]x[/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]"giá trị x sau khi ép kiểu: "[/color][color=#007700]+[/color][color=#0000bb]ex[/color][color=#007700]);    }}[/color]

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

bài 3: tính góc ko biết làm tới:d
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Mã nguồn PHP:


[color=#000000]
package bai3[/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]float a [/color][color=#007700]=[/color][color=#0000bb]3[/color][color=#007700], [/color][color=#0000bb]b [/color][color=#007700]=[/color][color=#0000bb]4[/color][color=#007700], [/color][color=#0000bb]c [/color][color=#007700]=[/color][color=#0000bb]5[/color][color=#007700], [/color][color=#0000bb]s[/color][color=#007700], [/color][color=#0000bb]cv[/color][color=#007700], [/color][color=#0000bb]p[/color][color=#007700];        [/color][color=#0000bb]p [/color][color=#007700]= ([/color][color=#0000bb]a[/color][color=#007700]+[/color][color=#0000bb]b[/color][color=#007700]+[/color][color=#0000bb]c[/color][color=#007700])/[/color][color=#0000bb]2[/color][color=#007700];        [/color][color=#0000bb]s [/color][color=#007700]= (float) [/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]sqrt[/color][color=#007700]([/color][color=#0000bb]p[/color][color=#007700]*([/color][color=#0000bb]p[/color][color=#007700]-[/color][color=#0000bb]a[/color][color=#007700])*([/color][color=#0000bb]p[/color][color=#007700]-[/color][color=#0000bb]b[/color][color=#007700])*([/color][color=#0000bb]p[/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]"diện tích tam giác là: "[/color][color=#007700]+[/color][color=#0000bb]s[/color][color=#007700]);    } }[/color]

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**hongnhan** · 09-09-2013, 07:00 AM

Gửi bởi huongta

nộp bài:

bài 1:
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Mã nguồn PHP:


[color=#000000]
package bai1[/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]int a[/color][color=#007700]=[/color][color=#0000bb]3[/color][color=#007700], [/color][color=#0000bb]b[/color][color=#007700]=[/color][color=#0000bb]4[/color][color=#007700], [/color][color=#0000bb]c[/color][color=#007700]=[/color][color=#0000bb]5[/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]"phần nguyên khi chia cho 2 của a, b, c lần lượt là: " [/color][color=#007700]+([/color][color=#0000bb]a[/color][color=#007700]/[/color][color=#0000bb]2[/color][color=#007700])+[/color][color=#dd0000]", " [/color][color=#007700]+([/color][color=#0000bb]b[/color][color=#007700]/[/color][color=#0000bb]2[/color][color=#007700])+[/color][color=#dd0000]", "  [/color][color=#007700]+([/color][color=#0000bb]c[/color][color=#007700]/[/color][color=#0000bb]2[/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]"phần dư khi chia cho 3 của a, b, c lần lượt là: " [/color][color=#007700]+([/color][color=#0000bb]a[/color][color=#007700]%[/color][color=#0000bb]3[/color][color=#007700])+[/color][color=#dd0000]", " [/color][color=#007700]+([/color][color=#0000bb]b[/color][color=#007700]%[/color][color=#0000bb]3[/color][color=#007700])+[/color][color=#dd0000]", " [/color][color=#007700]+([/color][color=#0000bb]c[/color][color=#007700]%[/color][color=#0000bb]3[/color][color=#007700]));        [/color][color=#0000bb]a[/color][color=#007700]++; [/color][color=#0000bb]b[/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]"giá trị a, b, c sau khi tăng: " [/color][color=#007700]+[/color][color=#0000bb]a[/color][color=#007700]+[/color][color=#dd0000]", "[/color][color=#007700]+[/color][color=#0000bb]b[/color][color=#007700]+[/color][color=#dd0000]", " [/color][color=#007700]+[/color][color=#0000bb]c[/color][color=#007700]);    }}[/color]

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

bài 2
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Mã nguồn PHP:


[color=#000000]
package bai2[/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]float a [/color][color=#007700]=[/color][color=#0000bb]2[/color][color=#007700], [/color][color=#0000bb]b[/color][color=#007700]=[/color][color=#0000bb]3[/color][color=#007700], [/color][color=#0000bb]c[/color][color=#007700]=[/color][color=#0000bb]4[/color][color=#007700], [/color][color=#0000bb]x[/color][color=#007700];        [/color][color=#0000bb]int ex[/color][color=#007700];        [/color][color=#0000bb]x [/color][color=#007700]= ([/color][color=#0000bb]8[/color][color=#007700]*[/color][color=#0000bb]c [/color][color=#007700]- [/color][color=#0000bb]b[/color][color=#007700])/([/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]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]"giá trị x là: "[/color][color=#007700]+[/color][color=#0000bb]x[/color][color=#007700]);        [/color][color=#0000bb]ex [/color][color=#007700]=  (int) [/color][color=#0000bb]x[/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]"giá trị x sau khi ép kiểu: "[/color][color=#007700]+[/color][color=#0000bb]ex[/color][color=#007700]);    }}[/color]

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

bài 3: tính góc ko biết làm tới:d
<div class="bbcodeblock bbcodequote bbcmspoilerblock">
<div class="attribution type"><noscript>spoiler (move your mouse to the spoiler area to reveal the content)</noscript>

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<div class="quotecontent">
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Mã nguồn PHP:


[color=#000000]
package bai3[/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]float a [/color][color=#007700]=[/color][color=#0000bb]3[/color][color=#007700], [/color][color=#0000bb]b [/color][color=#007700]=[/color][color=#0000bb]4[/color][color=#007700], [/color][color=#0000bb]c [/color][color=#007700]=[/color][color=#0000bb]5[/color][color=#007700], [/color][color=#0000bb]s[/color][color=#007700], [/color][color=#0000bb]cv[/color][color=#007700], [/color][color=#0000bb]p[/color][color=#007700];        [/color][color=#0000bb]p [/color][color=#007700]= ([/color][color=#0000bb]a[/color][color=#007700]+[/color][color=#0000bb]b[/color][color=#007700]+[/color][color=#0000bb]c[/color][color=#007700])/[/color][color=#0000bb]2[/color][color=#007700];        [/color][color=#0000bb]s [/color][color=#007700]= (float) [/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]sqrt[/color][color=#007700]([/color][color=#0000bb]p[/color][color=#007700]*([/color][color=#0000bb]p[/color][color=#007700]-[/color][color=#0000bb]a[/color][color=#007700])*([/color][color=#0000bb]p[/color][color=#007700]-[/color][color=#0000bb]b[/color][color=#007700])*([/color][color=#0000bb]p[/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]"diện tích tam giác là: "[/color][color=#007700]+[/color][color=#0000bb]s[/color][color=#007700]);    } }[/color]

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

goc a=arcsin(2*s/(a*b)) ( = radian)

Chủ đề: Bài 4: Toán tử và biểu thức, hàm toán học trong Java

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