0 like 0 dislike
6.5k 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 | 6.5k 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