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

**vongankute2015** · 06-09-2013, 07:00 AM

bài 1:
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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 hello[/color][color=#007700].[/color][color=#0000bb]world[/color][color=#007700]; [/color][color=#ff8000]/**** @author nobita*/[/color][color=#007700]public class [/color][color=#0000bb]helloworld [/color][color=#007700]{     [/color][color=#ff8000]/**    * @param args the command line arguments    */    [/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]b[/color][color=#007700],[/color][color=#0000bb]c[/color][color=#007700];        [/color][color=#0000bb]a[/color][color=#007700]=[/color][color=#0000bb]10[/color][color=#007700];[/color][color=#0000bb]b[/color][color=#007700]=[/color][color=#0000bb]11[/color][color=#007700];[/color][color=#0000bb]c[/color][color=#007700]=[/color][color=#0000bb]12[/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=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"b= "[/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]"c= "[/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]"phan nguyen chia a cho 2: "[/color][color=#007700]+[/color][color=#0000bb]a[/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]"phan du khi chia a cho 3: "[/color][color=#007700]+[/color][color=#0000bb]a[/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]"phan nguyen khi chia b cho 2: "[/color][color=#007700]+[/color][color=#0000bb]b[/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]"b%3: "[/color][color=#007700]+[/color][color=#0000bb]b[/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]"c/2: "[/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]"c%3: "[/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]"gia tri moi cua cac so: "[/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]

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chấm điểm: 10 điểm

bài 2:
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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 hello[/color][color=#007700].[/color][color=#0000bb]world[/color][color=#007700]; [/color][color=#ff8000]/**** @author nobita*/[/color][color=#007700]public class [/color][color=#0000bb]helloworld [/color][color=#007700]{     [/color][color=#ff8000]/**    * @param args the command line arguments    */    [/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]float a[/color][color=#007700],[/color][color=#0000bb]b[/color][color=#007700],[/color][color=#0000bb]c[/color][color=#007700],[/color][color=#0000bb]x[/color][color=#007700];[/color][color=#0000bb]int 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]"giai phuong trinh 2ax+b = 8c  voi a=1.1 b= 2.2 c=3.3"[/color][color=#007700]);        [/color][color=#0000bb]a[/color][color=#007700]=[/color][color=#0000bb]1.1f[/color][color=#007700];        [/color][color=#0000bb]b[/color][color=#007700]=[/color][color=#0000bb]2.2f[/color][color=#007700];        [/color][color=#0000bb]c[/color][color=#007700]=[/color][color=#0000bb]3.3f[/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]"x can tim: "[/color][color=#007700]+[/color][color=#0000bb]x[/color][color=#007700]);[/color][color=#0000bb]d[/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]"nghiem x sau khi ep kieu: "[/color][color=#007700]+[/color][color=#0000bb]d[/color][color=#007700]);    }}[/color]

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chấm điểm: bạn chưa loại trừ trường hợp a = 0

8.5 điểm

người chấm điểm: tiasangmoi

**mupoanh** · 06-10-2013, 07:00 AM

Gửi bởi tiasangmoi92

về kết quả thì nó không khác nhau, nhưng xét về độ tối ưu code
a = a+1 sẽ thực hiện 2 phép toán a+1 và gán a = a+1
còn a++ thì thực hiện tăng chính nó lên 1, nên chỉ thực hiện duy nhất 1 phép toán

Gửi bởi vjrus.ht

e xem video thì a+=1; tương đương với a= a+1 mà a. ở đây e muốn áp dụng cả 2 cách tăng giá trị của biến

em nghĩ là khi dùng a++ nó chỉ tăng a lên,còn khi dùng a=a+1 khi áp dụng cho cho vòng lạp thi có thể in cả giá trị a,vừa tăng vừa gán

**lely17** · 06-10-2013, 07:00 AM

bài 1
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Mã nguồn PHP:


[color=#000000]
 [/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]b[/color][color=#007700], [/color][color=#0000bb]c[/color][color=#007700];        [/color][color=#0000bb]a [/color][color=#007700]= [/color][color=#0000bb]11[/color][color=#007700];        [/color][color=#0000bb]b [/color][color=#007700]= [/color][color=#0000bb]27[/color][color=#007700];        [/color][color=#0000bb]c [/color][color=#007700]= [/color][color=#0000bb]45[/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 chia 2 lay nguyen la " [/color][color=#007700]+ [/color][color=#0000bb]a [/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]"b chia 2 lay nguyen la " [/color][color=#007700]+ [/color][color=#0000bb]b [/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]"c chia 2 lay nguyen la " [/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]"achia 3 lay du la " [/color][color=#007700]+ [/color][color=#0000bb]a [/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]"b chia 3 lay du la " [/color][color=#007700]+ [/color][color=#0000bb]b [/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]"c chia 3 lay du la " [/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]"so a,b,c sau khi tang lan luot 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]

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chấm điểm: 10 điểm

bài 2
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Mã nguồn PHP:


[color=#000000]
[/color][color=#007700]public class [/color][color=#0000bb]bài2 [/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]b[/color][color=#007700], [/color][color=#0000bb]c[/color][color=#007700], [/color][color=#0000bb]x[/color][color=#007700];        [/color][color=#0000bb]int songuyen[/color][color=#007700];        [/color][color=#0000bb]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]22[/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]" gia tri cua x la: " [/color][color=#007700]+ [/color][color=#0000bb]x[/color][color=#007700]);        [/color][color=#0000bb]songuyen [/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]"gia tri sau khi ep la: " [/color][color=#007700]+ [/color][color=#0000bb]songuyen[/color][color=#007700]);         }}[/color]

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chấm điểm: bài chưa loại trừ trường hợp a = 0,

nếu gán a = 0 chương trình sẽ lỗi

9 điểm

bài 3
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Mã nguồn PHP:


[color=#000000]
[/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]b[/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]s[/color][color=#007700], [/color][color=#0000bb]p[/color][color=#007700], [/color][color=#0000bb]k[/color][color=#007700];        [/color][color=#0000bb]a [/color][color=#007700]= [/color][color=#0000bb]5[/color][color=#007700];        [/color][color=#0000bb]b [/color][color=#007700]= [/color][color=#0000bb]8[/color][color=#007700];        [/color][color=#0000bb]c [/color][color=#007700]= [/color][color=#0000bb]4[/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]k [/color][color=#007700]= (float) ([/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]s [/color][color=#007700]= (float) [/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]sqrt[/color][color=#007700]([/color][color=#0000bb]k[/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]"s= " [/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]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=#ff8000]// áp dụng định lí cosin        [/color][color=#0000bb]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]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]"goc a co do lon la arccos " [/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]"goc b co do lon la arccos " [/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]"goc c co do lon la arccos " [/color][color=#007700]+ [/color][color=#0000bb]c[/color][color=#007700]);[/color]

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có thể do bạn vô tình không copy đủ code,

nhưng mình sẽ không chấm điểm những bài có thiếu xót tương tự

người chấm điểm: tiasangmoi

**muonginao** · 06-10-2013, 07:00 AM

bai 1:

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Mã nguồn PHP:


[color=#000000]
[/color][color=#007700]public class [/color][color=#0000bb]pheptinhchia [/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]double a [/color][color=#007700]= [/color][color=#0000bb]5[/color][color=#007700];        [/color][color=#0000bb]double b [/color][color=#007700]= [/color][color=#0000bb]6[/color][color=#007700];        [/color][color=#0000bb]double c [/color][color=#007700]=[/color][color=#0000bb]7[/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]"phan nguyen khi chia cac so cho 2 la:"[/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]a[/color][color=#007700]+[/color][color=#dd0000]"/2 = "[/color][color=#007700]+([/color][color=#0000bb]a[/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=#0000bb]b[/color][color=#007700]+[/color][color=#dd0000]"/2 = "[/color][color=#007700]+([/color][color=#0000bb]b[/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=#0000bb]c[/color][color=#007700]+[/color][color=#dd0000]"/2 = "[/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=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"phan du khi chia cac so cho 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=#0000bb]a[/color][color=#007700]+([/color][color=#dd0000]"%3 = "[/color][color=#007700]+([/color][color=#0000bb]a[/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=#0000bb]b[/color][color=#007700]+([/color][color=#dd0000]"%3 = "[/color][color=#007700]+([/color][color=#0000bb]b[/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=#0000bb]c[/color][color=#007700]+([/color][color=#dd0000]"%3 = "[/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]""[/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]"tang gia tri a, b, c moi bien len 1 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]

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chấm điểm: hi bạn, đề bài yêu cầu a, b, c, là số nguyên, bạn lại dùng số thực, trong khi phép tính lấy phần nguyên ( / ) đó, chỉ áp dụng cho số nguyên, nếu là số thực nó là phép chia, bạn chạy thử có lẽ cũng nhận ra chỗ sai ấy ngay trên kết quả!

5 điểm

bai 2:
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Mã nguồn PHP:


[color=#000000]
[/color][color=#007700]public class [/color][color=#0000bb]phuongtrinh [/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]0[/color][color=#007700], [/color][color=#0000bb]b [/color][color=#007700]= [/color][color=#0000bb]7[/color][color=#007700], [/color][color=#0000bb]c [/color][color=#007700]= [/color][color=#0000bb]6[/color][color=#007700];        if ([/color][color=#0000bb]a [/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]"gia tri a phai khac 0."[/color][color=#007700]);        else {            [/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]"gia tri truoc khi ep kieu:"[/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 = " [/color][color=#007700]+ [/color][color=#0000bb]x[/color][color=#007700]);            [/color][color=#0000bb]x [/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]"gia tri sau khi ep kieu"[/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 = " [/color][color=#007700]+ [/color][color=#0000bb]x[/color][color=#007700]);        }    }}[/color]

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chấm điểm: 10 điểm

bai 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]tamgiac [/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 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]"nhap cac canh cua tam giac: "[/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]double a [/color][color=#007700]= [/color][color=#0000bb]scan[/color][color=#007700].[/color][color=#0000bb]nextdouble[/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]double b [/color][color=#007700]= [/color][color=#0000bb]scan[/color][color=#007700].[/color][color=#0000bb]nextdouble[/color][color=#007700]();        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"c = "[/color][color=#007700]);        [/color][color=#0000bb]double c [/color][color=#007700]= [/color][color=#0000bb]scan[/color][color=#007700].[/color][color=#0000bb]nextdouble[/color][color=#007700]();        [/color][color=#0000bb]double dt [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700];        if(([/color][color=#0000bb]a[/color][color=#007700]+[/color][color=#0000bb]b[/color][color=#007700])>[/color][color=#0000bb]c [/color][color=#007700]&& ([/color][color=#0000bb]a[/color][color=#007700]+[/color][color=#0000bb]c[/color][color=#007700])>[/color][color=#0000bb]b [/color][color=#007700]&& ([/color][color=#0000bb]c[/color][color=#007700]+[/color][color=#0000bb]b[/color][color=#007700])>[/color][color=#0000bb]a[/color][color=#007700]){            [/color][color=#0000bb]double 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]dt [/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: "[/color][color=#007700]+[/color][color=#0000bb]dt[/color][color=#007700]);            [/color][color=#0000bb]double sinc [/color][color=#007700]= [/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]dt[/color][color=#007700]/([/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]b[/color][color=#007700]);            [/color][color=#0000bb]double sinb [/color][color=#007700]= [/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]dt[/color][color=#007700]/([/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700]);            [/color][color=#0000bb]double sina [/color][color=#007700]= [/color][color=#0000bb]2[/color][color=#007700]*[/color][color=#0000bb]dt[/color][color=#007700]/([/color][color=#0000bb]c[/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]"goc a = "[/color][color=#007700]+[/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]asin[/color][color=#007700]([/color][color=#0000bb]sina[/color][color=#007700])+[/color][color=#dd0000]" rad"[/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]"goc b = "[/color][color=#007700]+[/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]asin[/color][color=#007700]([/color][color=#0000bb]sinb[/color][color=#007700])+[/color][color=#dd0000]" rad"[/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]"goc c = "[/color][color=#007700]+[/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]asin[/color][color=#007700]([/color][color=#0000bb]sinc[/color][color=#007700])+[/color][color=#dd0000]" rad"[/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]"3 so ban nhap khong phai la 3 canh cua tam giac"[/color][color=#007700]);    }}[/color]

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

chấm điểm: công thức tính góc của bạn không chính xác với trường hợp

tam giác có góc tù. bạn nên dùng hàm để đổi thành độ thay vì để rad.

tham khảo bài các bạn đã nộp ở trên để tìm lỗi sai.

5 điểm.

người chấm điểm: tiasangmoi

hi bạn, lần sau bạn không nên post ra nhiều bình luận như vậy, gộp vào 1 bài như này là được ,nên chèn vào thẻ php để code dễ nhìn [bqt]

**ketoan247** · 06-10-2013, 07:00 AM

Gửi bởi thanhdatkma

bài 1

bài 3
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Mã nguồn PHP:


[color=#000000]
[/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]b[/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]s[/color][color=#007700], [/color][color=#0000bb]p[/color][color=#007700], [/color][color=#0000bb]k[/color][color=#007700];        [/color][color=#0000bb]a [/color][color=#007700]= [/color][color=#0000bb]5[/color][color=#007700];        [/color][color=#0000bb]b [/color][color=#007700]= [/color][color=#0000bb]8[/color][color=#007700];        [/color][color=#0000bb]c [/color][color=#007700]= [/color][color=#0000bb]4[/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]k [/color][color=#007700]= (float) ([/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]s [/color][color=#007700]= (float) [/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]sqrt[/color][color=#007700]([/color][color=#0000bb]k[/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]"s= " [/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]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=#ff8000]// áp dụng định lí cosin        [/color][color=#0000bb]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]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]"goc a co do lon la arccos " [/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]"goc b co do lon la arccos " [/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]"goc c co do lon la arccos " [/color][color=#007700]+ [/color][color=#0000bb]c[/color][color=#007700]);[/color]

</blockquote></div>
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trong netbean có công thức tính arc cos nhé. bài yêu cầu tìm số đo 3 góc

**linhduy1008** · 06-10-2013, 07:00 AM

bạn

Gửi bởi vjrus.ht

trong netbean có công thức tính arc cos nhé. bài yêu cầu tìm số đo 3 góc

bạn virut.ht: .còn hàm đấy người mới dùng không phải ai cũng biết,còn về mặt toán học thì nó không sai

**hotdeal** · 06-10-2013, 07:00 AM

Gửi bởi thanhdatkma

em nghĩ là khi dùng a++ nó chỉ tăng a lên,còn khi dùng a=a+1 khi áp dụng cho cho vòng lạp thi có thể in cả giá trị a,vừa tăng vừa gán

em xem lại video rồi chạy thử đoạn code này để biết a++ trong vòng lặp

Mã nguồn PHP:


[color=#000000]
[/color][color=#007700]public class [/color][color=#0000bb]vidu [/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];        for ([/color][color=#0000bb]a[/color][color=#007700]=[/color][color=#0000bb]1[/color][color=#007700];[/color][color=#0000bb]a[/color][color=#007700]<=[/color][color=#0000bb]10[/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]"a = "[/color][color=#007700]+[/color][color=#0000bb]a[/color][color=#007700]);        }    }}[/color]

**hajnguyen666** · 06-10-2013, 07:00 AM

bai 1:
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Mã nguồn PHP:


[color=#000000]
[/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]"a lay nguyen voi 2 la : "[/color][color=#007700]+[/color][color=#0000bb]a[/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]"b lay nguyen voi 2 la : "[/color][color=#007700]+[/color][color=#0000bb]b[/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]"c lay nguyen voi 2 la : "[/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]"a lay du voi 3 la: "[/color][color=#007700]+[/color][color=#0000bb]a[/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]"b lay du voi 3 la: "[/color][color=#007700]+[/color][color=#0000bb]b[/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]"c lay du voi 3 la: "[/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]"a tang len 1: "[/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]"b tang len 1: "[/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]"c tang len 1: "[/color][color=#007700]+(++[/color][color=#0000bb]c[/color][color=#007700]));    }}[/color]

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

chấm điểm: 10 điểm

bai 2:
<div class="bbcodeblock bbcodequote bbcmspoilerblock">
<div class="attribution type"><noscript>spoiler (move your mouse to the spoiler area to reveal the content)</noscript>

show spoiler
hide spoiler

</div>
<div class="quotecontent">
<div class="bbcm_spoiler_noscript"><blockquote>

Mã nguồn PHP:


[color=#000000]
[/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]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]x[/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]"x float la: "[/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 int la: "[/color][color=#007700]+(int)[/color][color=#0000bb]x[/color][color=#007700]);    }}[/color]

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

chấm điểm: do bài bạn chưa loại trừ trường hợp a = 0

8.5 điểm

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

show spoiler
hide spoiler

</div>
<div class="quotecontent">
<div class="bbcm_spoiler_noscript"><blockquote>

Mã nguồn PHP:


[color=#000000]
[/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]chuvi[/color][color=#007700],[/color][color=#0000bb]dientich[/color][color=#007700];        [/color][color=#0000bb]chuvi [/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]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]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"dien tich cua tam giac la: "[/color][color=#007700]+[/color][color=#0000bb]dientich[/color][color=#007700]);        [/color][color=#0000bb]double goca[/color][color=#007700], [/color][color=#0000bb]gocb[/color][color=#007700], [/color][color=#0000bb]gocc[/color][color=#007700];        [/color][color=#0000bb]goca [/color][color=#007700]= [/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]asin[/color][color=#007700]([/color][color=#0000bb]dientich[/color][color=#007700]/([/color][color=#0000bb]0.5[/color][color=#007700]*[/color][color=#0000bb]b[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700]));        [/color][color=#0000bb]gocb [/color][color=#007700]= [/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]asin[/color][color=#007700]([/color][color=#0000bb]dientich[/color][color=#007700]/([/color][color=#0000bb]0.5[/color][color=#007700]*[/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700]));        [/color][color=#0000bb]gocc [/color][color=#007700]= [/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]asin[/color][color=#007700]([/color][color=#0000bb]dientich[/color][color=#007700]/([/color][color=#0000bb]0.5[/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]"so do cua goc a la: "[/color][color=#007700]+[/color][color=#0000bb]todegrees[/color][color=#007700]([/color][color=#0000bb]goca[/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 do cua goc b la: "[/color][color=#007700]+[/color][color=#0000bb]todegrees[/color][color=#007700]([/color][color=#0000bb]gocb[/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 do cua goc c la: "[/color][color=#007700]+[/color][color=#0000bb]todegrees[/color][color=#007700]([/color][color=#0000bb]gocc[/color][color=#007700]));    }}[/color]

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

chấm điểm: chuvi bạn ghi làm gì?, p bạn chưa khai báo, bạn nên test kỹ bài rồi đăng. có thể chỉ do bạn nhầm lẫn chút!

với trường hợp tam giác tù, cách tính góc của bạn sẽ không cho kết quả chính xác. bạn tham khảo bài của các bạn đã đăng để hiểu chỗ này!

4 điểm

người chấm: tiasangmoi

**thokhangduong** · 06-10-2013, 07:00 AM

Gửi bởi trần văn chiến

bai 1:
<div class="bbcodeblock bbcodequote bbcmspoilerblock">
<div class="attribution type"><noscript>spoiler (move your mouse to the spoiler area to reveal the content)</noscript>

show spoiler
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</div>
<div class="quotecontent">
<div class="bbcm_spoiler_noscript"><blockquote>

Mã nguồn PHP:


[color=#000000]
[/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]"a lay nguyen voi 2 la : "[/color][color=#007700]+[/color][color=#0000bb]a[/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]"b lay nguyen voi 2 la : "[/color][color=#007700]+[/color][color=#0000bb]b[/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]"c lay nguyen voi 2 la : "[/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]"a lay du voi 3 la: "[/color][color=#007700]+[/color][color=#0000bb]a[/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]"b lay du voi 3 la: "[/color][color=#007700]+[/color][color=#0000bb]b[/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]"c lay du voi 3 la: "[/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]"a tang len 1: "[/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]"b tang len 1: "[/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]"c tang len 1: "[/color][color=#007700]+(++[/color][color=#0000bb]c[/color][color=#007700]));    }}[/color]

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

chấm điểm: 10 điểm

bai 2:
<div class="bbcodeblock bbcodequote bbcmspoilerblock">
<div class="attribution type"><noscript>spoiler (move your mouse to the spoiler area to reveal the content)</noscript>

show spoiler
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</div>
<div class="quotecontent">
<div class="bbcm_spoiler_noscript"><blockquote>

Mã nguồn PHP:


[color=#000000]
[/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]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]x[/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]"x float la: "[/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 int la: "[/color][color=#007700]+(int)[/color][color=#0000bb]x[/color][color=#007700]);    }}[/color]

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

chấm điểm: do bài bạn chưa loại trừ trường hợp a = 0

8.5 điểm

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

show spoiler
hide spoiler

</div>
<div class="quotecontent">
<div class="bbcm_spoiler_noscript"><blockquote>

Mã nguồn PHP:


[color=#000000]
[/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]chuvi[/color][color=#007700],[/color][color=#0000bb]dientich[/color][color=#007700];        [/color][color=#0000bb]chuvi [/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]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]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"dien tich cua tam giac la: "[/color][color=#007700]+[/color][color=#0000bb]dientich[/color][color=#007700]);        [/color][color=#0000bb]double goca[/color][color=#007700], [/color][color=#0000bb]gocb[/color][color=#007700], [/color][color=#0000bb]gocc[/color][color=#007700];        [/color][color=#0000bb]goca [/color][color=#007700]= [/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]asin[/color][color=#007700]([/color][color=#0000bb]dientich[/color][color=#007700]/([/color][color=#0000bb]0.5[/color][color=#007700]*[/color][color=#0000bb]b[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700]));        [/color][color=#0000bb]gocb [/color][color=#007700]= [/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]asin[/color][color=#007700]([/color][color=#0000bb]dientich[/color][color=#007700]/([/color][color=#0000bb]0.5[/color][color=#007700]*[/color][color=#0000bb]a[/color][color=#007700]*[/color][color=#0000bb]c[/color][color=#007700]));        [/color][color=#0000bb]gocc [/color][color=#007700]= [/color][color=#0000bb]math[/color][color=#007700].[/color][color=#0000bb]asin[/color][color=#007700]([/color][color=#0000bb]dientich[/color][color=#007700]/([/color][color=#0000bb]0.5[/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]"so do cua goc a la: "[/color][color=#007700]+[/color][color=#0000bb]todegrees[/color][color=#007700]([/color][color=#0000bb]goca[/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 do cua goc b la: "[/color][color=#007700]+[/color][color=#0000bb]todegrees[/color][color=#007700]([/color][color=#0000bb]gocb[/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 do cua goc c la: "[/color][color=#007700]+[/color][color=#0000bb]todegrees[/color][color=#007700]([/color][color=#0000bb]gocc[/color][color=#007700]));    }}[/color]

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

chấm điểm: chuvi bạn ghi làm gì?, p bạn chưa khai báo, bạn nên test kỹ bài rồi đăng. có thể chỉ do bạn nhầm lẫn chút!

với trường hợp tam giác tù, cách tính góc của bạn sẽ không cho kết quả chính xác. bạn tham khảo bài của các bạn đã đăng để hiểu chỗ này!

4 điểm

người chấm: tiasangmoi

ok

**vantuan31** · 06-22-2013, 07:00 AM

bài 1:

Mã nguồn PHP:


[color=#000000]
[/color][color=#007700]public class [/color][color=#0000bb]bai1 [/color][color=#007700]{     [/color][color=#ff8000]/**    * @param args the command line arguments    */    [/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]b[/color][color=#007700], [/color][color=#0000bb]c[/color][color=#007700];        [/color][color=#0000bb]a [/color][color=#007700]= [/color][color=#0000bb]5[/color][color=#007700];        [/color][color=#0000bb]b [/color][color=#007700]= [/color][color=#0000bb]6[/color][color=#007700];        [/color][color=#0000bb]c [/color][color=#007700]= [/color][color=#0000bb]7[/color][color=#007700];        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"phần nguyên khi chia a, b, c 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]"\t" [/color][color=#007700]+ [/color][color=#0000bb]b[/color][color=#007700]/[/color][color=#0000bb]2 [/color][color=#007700]+ [/color][color=#dd0000]"\t" [/color][color=#007700]+ [/color][color=#0000bb]c[/color][color=#007700]/[/color][color=#0000bb]2 [/color][color=#007700]+ [/color][color=#dd0000]"
"[/color][color=#007700]);        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"phần dư khi chia a, b, ,c cho 3 lần lượt là: "[/color][color=#007700]+ [/color][color=#0000bb]a[/color][color=#007700]%[/color][color=#0000bb]3 [/color][color=#007700]+ [/color][color=#dd0000]"\t" [/color][color=#007700]+ [/color][color=#0000bb]b[/color][color=#007700]%[/color][color=#0000bb]3 [/color][color=#007700]+ [/color][color=#dd0000]"\t" [/color][color=#007700]+ [/color][color=#0000bb]c[/color][color=#007700]%[/color][color=#0000bb]3 [/color][color=#007700]+ [/color][color=#dd0000]"
"[/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].print([/color][color=#dd0000]"giá trị a, b, c sau khi tăng 1 là: " [/color][color=#007700]+ [/color][color=#0000bb]a [/color][color=#007700]+ [/color][color=#dd0000]"\t" [/color][color=#007700]+ [/color][color=#0000bb]b [/color][color=#007700]+ [/color][color=#dd0000]"\t" [/color][color=#007700]+ [/color][color=#0000bb]c [/color][color=#007700]+ [/color][color=#dd0000]"
"[/color][color=#007700]);    }}[/color]

chấm điểm: 10 điểm!

bài 2:

Mã nguồn PHP:


[color=#000000]
[/color][color=#007700]public class [/color][color=#0000bb]bai2 [/color][color=#007700]{     [/color][color=#ff8000]/**    * @param args the command line arguments    */    [/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 x[/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]a [/color][color=#007700]= [/color][color=#0000bb]2.1f[/color][color=#007700];        [/color][color=#0000bb]b [/color][color=#007700]= [/color][color=#0000bb]3.5f[/color][color=#007700];        [/color][color=#0000bb]c [/color][color=#007700]= [/color][color=#0000bb]4.5f[/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].print([/color][color=#dd0000]"giá trị của x = " [/color][color=#007700]+ [/color][color=#0000bb]x [/color][color=#007700]+ [/color][color=#dd0000]"
"[/color][color=#007700]);        [/color][color=#0000bb]x [/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].print([/color][color=#dd0000]"giá trị của x sau khi ép kiểu = " [/color][color=#007700]+ [/color][color=#0000bb]x [/color][color=#007700]+ [/color][color=#dd0000]"
"[/color][color=#007700]);    }}[/color]

chấm điểm: do bạn chưa loại th a = 0

9 điểm

bài 3:

Mã nguồn PHP:


[color=#000000]
[/color][color=#007700]public class [/color][color=#0000bb]bai3 [/color][color=#007700]{     [/color][color=#ff8000]/**    * @param args the command line arguments    */    [/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]b[/color][color=#007700], [/color][color=#0000bb]c[/color][color=#007700], [/color][color=#0000bb]s[/color][color=#007700];        [/color][color=#0000bb]a [/color][color=#007700]= [/color][color=#0000bb]3f[/color][color=#007700];        [/color][color=#0000bb]b [/color][color=#007700]= [/color][color=#0000bb]4f[/color][color=#007700];        [/color][color=#0000bb]c [/color][color=#007700]= [/color][color=#0000bb]5f[/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]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].print([/color][color=#dd0000]"diện tích tam giác abc : " [/color][color=#007700]+ [/color][color=#0000bb]s [/color][color=#007700]+ [/color][color=#dd0000]"
"[/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]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 b [/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]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]double c [/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]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]2[/color][color=#007700]*[/color][color=#0000bb]b[/color][color=#007700]*[/color][color=#0000bb]a[/color][color=#007700]));        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"góc a = " [/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
góc b = " [/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
góc c = " [/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]