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:104.23.243.165
©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