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