0 like 0 dislike
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 | 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:104.23.197.64
©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
| 7.4k 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
| 8.6k 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
| 7k 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