0 like 0 dislike
6k views
正三角形的面積公式是[4分之根號3乘a平方],請設計一個程式,讓使用者輸入正三角形的邊長,然後輸出正三角形的面積,輸出時請輸出並四捨五入到小數點後兩位。

範例輸入:

8

範例輸出:

21.71
[Normal] Coding (C) - asked in 2016-1 程式設計(一)AC by (18k points)
ID: 13422 - Available when: Unlimited - Due to: Unlimited
3 flags | 6k views
0 0
Called for Help

35 Answers

0 like 0 dislike
Hidden content!
******* * **

#include * * **

int main()

{


**** * * ***** * * ** * A ,B;
** * ****** * * * * * * * * * *** ** * *
* *** ** * ** * = sqrt(3)/4*A*A;
* * **** * ** * * *** ** *** * **



}
answered by (-82 points)
0 like 0 dislike
Hidden content!
* ** ** **** * **
* * * ** *





int main (void)



{
*** * int a,i;
****** **

* * ** * double *
***** ** ** **

**** * **** scanf * * * ** ***** *** *
** * * *

** * * * b = * *
* * ** **

* * ** * * c = ** *
** * *

** ** * * * * * * * * ***** **
** * ****

* **** * ** ** *** 0;
*** * ***** *

}
answered by (-157 points)
0 like 0 dislike
Hidden content!
#include ** * *

#include ** ** *

#include * * * *

int main()

{
* * * **** * * *** ** * a;
* ** **** * * *** * ** b;
*** * **** *** ***** ** * *** * **** ** &a);
** **** ***** ** ** **** * * * **
* ** * * ** ***** * ** * ** * ** b);
* *** * * ***** * **** ***** ** 0;

}
answered by (-158 points)
0 like 0 dislike
Hidden content!
#include ** **** * *
****** *** ** ***
* ** ** * *





int * *
* ** *** * * ** * **** * a,ans;
* * * * ** * * * * * * * * *
* *** * ***** * * * = sqrt(3) * 0.25 * a * a;
** ** * **** * ** ** * *** ans);


*** * *** * * *** * * * * *** * **

return 0;

}
answered by (-122 points)
0 like 0 dislike
Hidden content!
#include <stdio.h>

#include * *** *** ****

#include ** * ** * * ***

#include <math.h>





int main()
* * * ** ** * * ** * * ***
* *** * * ** *** ***** * * ** *** * a=0,c=0;
* * ** * *** * ***** * * ***** * ** * * ** **** ** *
* * *** * ** ** ***** ** * * ** * ** = *** **
**** ** ** * *** * ** * ** ** ** * * ** * ** * *
*** * * *** ** * ** ****** * ** ** * ** * 0;
* ****** * * *** * * *
answered by (-216 points)
0 like 0 dislike
Hidden content!
#include <stdio.h>





int main()
* * * * ** *
*** * ** *** * **** * ** * * *** ** * a=0,c=0;
** * * * * * ** ******* * * * ****** ** ** ** ** * * ** *
*** * ** * *** ** *** * * * *** = ((sqrt(3.0)/4.0)*(a*a));
* * *** ***** * * * *** * **** * *** ***** * *
*** * * * *** * * * * ** * ** * * ** ** * 0;
** ** ** * ** * * * *
answered by (-216 points)
0 like 0 dislike
Hidden content!
#include <stdio.h>

#include * * * ** ** **

#include <ctype.h>





int main()
** ** ***** ** * *
* ** * * * * * *** *** * * *** ** a,b,c;
* * *** * ***** ** * ** ** *** * ** * ** ** * ** ** * *
** ** **** ** ** ** ** *** * ** * * * * = sqrt(3.0);
* * ** *** * * ** ** * * ** * * * **** = ((b / 4.0) * (a * a));
* * * ** * ** *** * * * ** ** * *** * *** ** * **** **
* *** ** ** * ** ** ** ** ** * ** * ** 0;
**** *** ** *****
answered by (-216 points)
0 like 0 dislike
Hidden content!
#include * ** * * **

#include * *

#include * ** * ***

int main()

{
* *** * * *** ** *** * * * a,area;
* * * * * ** ***** ** ** * ******* * ** * ***
***** ** ***** * ** * = sqrt(3) / 4 * a * a;
** * * * * * ***** ** * * * **** *


** ** * * * ** * 0;



}
answered by (-320 points)
0 like 0 dislike
Hidden content!
** * *** * ** *
*** *** * * **** *

int main()

{

int a = 0;
* * ** ** ***** * *
* **** **** * ** ** * ** * *


** * 0;



}
answered by (-140 points)
0 like 0 dislike
Hidden content!
*** * * * *



int * *

{
* **** * * * * ** n, A;


** *** * * * * ** * * * * , ** *****
* * * * * *** *** * * = (1.732 * n * n) / 4;
** * ** * ** *** * * * ** * ** * , A);



}
answered by (-90 points)
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:104.23.243.108
©2016-2026

Related questions

0 like 0 dislike
43 answers
[Normal] Coding (C) - asked Oct 11, 2016 in 2016-1 程式設計(一)AC by Shun-Po (18k points)
ID: 13025 - Available when: Unlimited - Due to: Unlimited
| 7.4k views
0 like 0 dislike
49 answers
[Normal] Coding (C) - asked Oct 11, 2016 in 2016-1 程式設計(一)AC by Shun-Po (18k points)
ID: 13023 - Available when: Unlimited - Due to: Unlimited
| 8.5k views
0 like 0 dislike
39 answers
[Normal] Coding (C) - asked Oct 11, 2016 in 2016-1 程式設計(一)AC by Shun-Po (18k points)
ID: 13020 - Available when: Unlimited - Due to: Unlimited
| 7k views
0 like 0 dislike
7 answers
[Exercise] Coding (C) - asked Oct 27, 2016 in 2016-1 程式設計(一)AC by Shun-Po (18k points)
ID: 15399 - Available when: 2016-10-27 18:30:00 - Due to: 2016-10-27 21:00:00
| 2k views
12,783 questions
183,442 answers
172,219 comments
4,824 users