0 like 0 dislike
5.9k 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 | 5.9k 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:104.23.197.94
©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
| 7.3k 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
| 6.9k 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