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