0 like 0 dislike
6.5k 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 | 6.5k 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:104.23.243.109
©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
| 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
| 9.2k 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
| 7.5k 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
| 2.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users