0 like 0 dislike
5.6k views
直線方程式的通式為 ax+by+c=0 ,請設計一程式,由使用者輸入平面上兩點,程式會計算出直線方程式後輸出a, b, c。

輸入說明:輸入會包含四個浮點數,倆倆之間會用一個空白隔開,四個浮點數依序代表第一個點的x座標、第一個點的y座標、地按個點的x座標、第二個點的y座標。

輸出說明:請依序輸出 a, b, c 三個常數,每個數都需輸出到小數點後六位。請確保a, b, c 間的最大公因數為1。

輸入範例:

1.0 1.0 1.0 2.0

輸出範例:

1.000000 0.000000 -1.000000
[Exercise] Coding (C) - asked in 2016-1 程式設計(一)AC by (18k points)
ID: 18070 - Available when: Unlimited - Due to: Unlimited

reshown by | 5.6k views

49 Answers

0 like 0 dislike
Hidden content!
* ** ****** **
* ***** ******* *

int main(void)

{
* ** * **** ** ** ** x1,y1,x2,y2;
******* * ** ** a,b,c;
* * * * ** * ***** ** ** ** * **** * ** ** * *** * * * *
* * * ***** *
* * * ** * ** ***** *** * * * * * **** * * ** * ** = y2 - y1;
* * ***** *** * * *** * ***** * ** * ** = x1 - x2;
***** *** ** * *** **** * *** ** * *** * * * * = -x1 * (y2-y1) + y1 * (x2-x1);
**** * * * **** **
** ***** * * * * ** * * %.6f %.6f",a,b,c);






** *** ****** * * 0;

}
answered by (-320 points)
0 like 0 dislike
Hidden content!
#include<stdio.h>
* * * **** * **** ***

int main(void)

{
* ** * * **** **** x1,y1,x2,y2;
***** * ***** * * a,b,c;
** * ** * ** * ** *** * * ****** ** *** * **** * ** * *
*** ** ***** *
*** * * ** * ** ** * * ** **** * ** ****** = y2 - y1;
** *** * * * ***** * * * * * *** ***** ** = x1 - x2;
** ** * ** **** ** * **** * * *** * = -x1 * (y2-y1) + y1 * (x2-x1);
*** **** * **** * *
*** * ******** ** *** ** ****** *** * ** ***






* * * ********* * * **** * 0;

}
answered by (-320 points)
0 like 0 dislike
Hidden content!
*** * * * **


* *



{
** * * y2, a, b, c;
* * ** * ** * * ** **
** * *** ** * * **
** * * * *** ** *
** ** * * * * ** * **** * **



a = (y1 - y2) / (x1 - ** ***

b = / *

c = * * ***
* * * * * ** a);
***** * ************* b);
* * * ***** ******* **
** 0;

}
answered by (-120 points)
0 like 0 dislike
Hidden content!
#include <stdio.h>

#include <stdlib.h>



int main()

{
****** **** ** ** * ** ** * * x1,y1,x2,y2,m,b,c;
*** * ** * *** ** n;
* * * ***** * *** ** ***** ** * ***** *** * ** * * ** * *** * *
**** * * ** *** * * * * ******

    {
* * **** * * * *** ** ** * ** ** * *** ** * ** = (y2-y1)/(x2-x1);
******** ** * ******* ** ** * * * **** ***** = 1;
* * ** * * **** * * ** * ** * ** **** *** ** ** = m * x1 - y1;

    }
* * ** * * * * * * if (x2<x1)

    {
* ** * ***** * * *** *** * * * * *** * * = (y1-y2)/(x1-x2);
* * *** * ** *** * **** * * *** * * * * = 1;
** **** **** **** * * **** * ** * *** ** = m * x1 - y1;
* ** **** ** **
* * ** * **** * * * * * if (y1 == y2)

    {
* ** ** *** * * ** *** * **** * * ***** * **** ** = 0;
* * *** ***** ** * * ** * * ** * * ** = 1;
* *** * * ** *** *** *** * * ** ** = -y1;
* * * *** *** *** * *
** * ***** * *** * if (x1 == x2)
* * ** * * * ** * **
*** ** * * * * * ** * * * ** *** * * ** = 1;
* * **** *** **** ** ***** * * * * ***** *** = 0;
** * **** *** * *** ** * * ** ** **** * = -m;

    }
* ***** ** ** * ** * * * **

    {
* ** ** ** ** *** * * * * * * ** ** == b/n && m/n == c/n)
******* * *** * * ** ** * ** * ** ** *
*** **** **** * * *** ** * * * * * ** * ** ****** **** *** **** = m/n;
* ** ** ** * * *** *** *** * * * ******* ** * * *** ***** * ** = b/n;
** * ************* ** *** **** * * * * ** ***** ** ** ** * * = c/n;
* ** ** *** * ***** ** * ** ** * * **
*** * ** * * * * * ** *** ** ** *** ** *** ***
*** * * * * * * **** * ** *** * * * *
* * * **** ********** * ** * *** ***** ** *** ****** * * ***** ** = m;
* * *** *** * **** * * ***** *** ** *** * * * **** * * ** = b;
** *** ** ** * ** ******* * * * **** * * ***** ** * * = c;
* ** ** ***** ** ** * * *** * * * *

    }
** ** *** ** ** * * ** * * * * * *** %.6f %.6f\n",m,b,c);
** * ** ** * * 0;

}
answered by (-85 points)
0 like 0 dislike
Hidden content!
#include <stdio.h>

#include <stdlib.h>



int main()

{
* * * ** * *** ** *** x1,y1,x2,y2,m,b,c;
* **** ** * * *** * n;
*** * ****** ** * * *** ** * * * * * ******** * * ** * * *** *** **
* ********** * ****** * * * *

    {
* *** *** * ** ** *** * ** * = (y2-y1)/(x2-x1);
** * * * * * *** * ** * * ** * ** **** = 1;
* *** * * ** * * * * * * * * ** *** * ** * * * = m * x1 - y1;
***** *** **** ** ** *
** ** * * * * ** **** * * if (x2<x1)
** ****** ** **
** ** * ** * * ** * * ** ** * * * ** *** = (y1-y2)/(x1-x2);
* * ** * ******* *** * ** *** * ** * ** = 1;
*** ** * * *** *** * ** * ** *** * ** *** * ** * = m * x1 - y1;
** ** **** * *** **** **
** * * ** * * * * * if (y1 == y2)

    {
** * * ** * *** ***** * * ** * *** ** = 0;
*** **** *** * * * * * * ** * * * * * = 1;
*** ** ** ** *** * * * * **** * * = -y1;
******** * **** *** **
* * ** ****** * * * * if (x1 == x2)

    {
* ** * ***** *** * * * *** **** * * * * = 1;
* *** * *** ****** *** ********* ** ** * * * = 0;
* * ***** *** * * ** * * ** ** * * * ***** *** * = -m;
* *** ** * **
* **** ***** * * ** ** * ** *** * * **

    {
** ** ***** ******** * ****** * * * * * ** ** ** == b%n && m%n == c%n)
** * * ** ** * * *** **** ** * ****** * ** * *** ***
* * ** * * ** *** * ** * ***** * ***** * ** ** * * * ****** ** **** * * = m/n;
******** *** ** * ** * * * * * ***** ** ** * *** ** * * ** = b/n;
*** ******* * ** *** * * *** * * ** ** ***** * ***** * * ** * * = c/n;
**** * ** *** ** ** * * * ****** ** * *
* * *** ** *** * ***** **** * *** ** * * * **** *
**** ** * * ***** * ** * **** ******** ** ** * * ** ** * ** *** %.6f %.6f\n",m,b,c);

    }
*** ** * * 0;

}
answered by (-85 points)
0 like 0 dislike
Hidden content!
#include * *****

#include ** *** **

#include * * ***** *



int main(void)

{
**** *** * * ** * a1,a2,b1,b2,a,b,c;
** ** * *** * ** ****** %f %f ** ** ** **
** * * ** * ** * * ** * ***
**** * * ** * ***** **
** ***** ******* *** * ** *** ** * * *****
* * ** * ** **** * *** ***** ** *** %.6f * * * ** * * * *



return 0;

}
answered by (-248 points)
0 like 0 dislike
Hidden content!
#include<stdio.h>
**** * * * *
* *** ** ** *** * *

#include<math.h>



int main()

{
* ** ** ** **** * * * * * x1,x2,y1,y2,m,a,c0;
*** **** *** * *** **** *** * * * **** * * *
** * ** * * ***** * **** *** ** ** * ** *
** * ** *** * * *** * * * * *** *
* * * * **** * * ** *** *** * * * ** ** * ***
** **** ** * ** ** * = (y1-y2)/(x1-x2);
** * * *** * * *** * * *** **
*** * * ** ** *** * * * ** * * ** *** *
**** ** ** *** ****** * ** * * * %f * * *** *** * *** **

return 0;

}
answered by (-102 points)
0 like 0 dislike
Hidden content!
* * * * * * ** * *
* ** * * * *** *

int main()

{
* ** * ** * * * * x1,y1,x2,y2 ;
** * **** * * * * * ** * ** ******* * * * ****** *** * ;
* * **** * ** *** * a,b,c ;
*** * ** * * = y2-y1 ;
* * ******* * * = x1-x2 ;
* * * ** ** ** = -((a*x1)+(b*y1)) ;


**** *** * * ** * * * %f * * ** ** * ;


** * * ** *** * * * * 0 ;

}
answered by (-88 points)
0 like 0 dislike
Hidden content!
#include <stdio.h>

#include <stdlib.h>



int main()

{
******* ** *** * * * * x1,y1,x2,y2,m,a,b,c;
* ** * * ******* * *** * * ** *** * * *** * * ** ** * ** *** *** * ** *** ***
**** ** * ** * * * ** * ** * * *****
**** * *** * * * **
*** * * * * * * **** *** ** ** *** * ** *** ** * = (y2-y1)/(x2-x1);
** **** ** * **** *** * * * * ****** * ** = 1;
* ** * * * * * * ** ** * ** **** * * * * = m * x1 - y1;
** * *** *** * * ** * *
* **** ** * *** ** *** * if (x2<x1)
** ** * *
* * *** * * * ** ** * * * * ** * ** * * * = (y1-y2)/(x1-x2);
*** ** *** *** * * ** ** * * * ** * ** * = 1;
** * *** * * * ** **** * * * ** * * * = m * x1 - y1;
*** ** * ** ** * *
* ***** * * * * * * * if (y1 == y2)

    {
**** * * ****** ** *** * ** * ** * ** * = 0;
* ** * **** * * * * *** **** * ** * * * ** ** = 1;
** * * ** ** ** ** ** **** * * * = -y1;
* * * *** * * ***
*** * * ** * * ** * * * if (x1 == x2)

    {
* * *** ** * * * * ** * * * * * * ** = 1;
*** * ** ** * * ** * ** * * ** *** = 0;
*** *** * ** * ** * ** * * * * *** * ** * * * * = -m;
* * * ** ** ** ** *******
** ** * ** * * *** ** ** * ** **** %.6f %.6f\n",m,b,c);
**** * * * * * * **** * ** 0;

}
answered by (-85 points)
0 like 0 dislike
Hidden content!
**** ** ****** * *
* * * *** ****
* * * *
i * * *
* * * , b , c , ** **** **
** ** ; i * ; ***
* * * * * * * *** , * ** * * * * );




* * == * *

{ * * = 1;
* * ** * ****** = - * *

}


* ********* *** ** **** **

{

a * * * * *

c = ** * *** ;

b = -1 ;

}
* *** == 0)
* **** * * * 0 ;
*** * *
* ** ** * *** 0 ;
***** * * *
** * * ** * * 0 ;
* * * * * * *** * ** ** *


** * * * * **
* ***** *** * * * * ** * * *** **** * h , *




* *** ** * * ** ** *** **
**


** *** ** *** ** **** * a , b ,c *










** 0 ;







}
answered by (-87 points)
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.69.6.52
©2016-2025

Related questions

0 like 0 dislike
16 answers
[Exercise] Coding (C) - asked Dec 1, 2016 in 2016-1 程式設計(一)AC by Shun-Po (18k points)
ID: 18075 - Available when: 2016-12-01 18:30:00 - Due to: 2016-12-01 21:00:00
| 2.9k views
0 like 0 dislike
86 answers
[Exercise] Coding (C) - asked Dec 1, 2016 in 2016-1 程式設計(一)AC by Shun-Po (18k points)
ID: 18071 - Available when: 2016-12-01 18:30:00 - Due to: 2016-12-01 21:00:00
| 9.8k views
0 like 0 dislike
62 answers
[Exercise] Coding (C) - asked Dec 1, 2016 in 2016-1 程式設計(一)AC by Shun-Po (18k points)
ID: 18067 - Available when: 2016-12-01 18:30:00 - Due to: 2016-12-01 21:00:00
| 7.8k views
0 like 0 dislike
21 answers
[Exercise] Coding (C) - asked Dec 1, 2016 in 2016-1 程式設計(一)AC by Shun-Po (18k points)
ID: 18066 - Available when: 2016-12-01 18:30:00 - Due to: 2016-12-01 21:00:00
| 3.4k views
0 like 0 dislike
0 answers
[Resource] asked Dec 1, 2016 in 2016-1 程式設計(一)AC by Shun-Po (18k points)
ID: 18085 - Available when: Unlimited - Due to: Unlimited
| 10 views
12,783 questions
183,442 answers
172,219 comments
4,824 users