0 like 0 dislike
6.6k 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 | 6.6k 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:104.23.243.5
©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
| 9.3k 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
| 7.6k 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