0 like 0 dislike
6.1k 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 | 6.1k 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:104.23.197.65
©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
| 7.5k 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
| 8.7k 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
| 7.1k 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