0 like 0 dislike
2.7k 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 | 2.7k 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:172.69.17.30
©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
| 1.4k 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
| 4.6k 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
| 3.5k 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
| 1.5k 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
183,443 answers
172,219 comments
4,824 users