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:104.23.197.64
©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