0 like 0 dislike
5.4k 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 | 5.4k 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:104.23.243.164
©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
| 6.8k 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
| 7.8k 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
| 6.4k 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
| 1.8k views
12,783 questions
183,442 answers
172,219 comments
4,824 users