/*
Program: Write a C program that would find the length of a straight line
formed by two end points, whose co-ordinates would be given as inputs.
Author: www.atnyla.com
*/
#include "stdio.h"
#include "math.h"
int main( )
{
float x1, y1, x2, y2, lin_len; /* (x1,y1) and (x2,y2) are co-ordinates of two points */
printf("\n\n Enter x-co-ordinate of first point: ");
scanf("%f", &x1);
printf("\n Enter y-co-ordinate of first point: ");
scanf("%f", &y1);
printf("\n\n Enter x-co-ordinate of second point: ");
scanf("%f", &x2);
printf("\n Enter y-co-ordinate of second point: ");
scanf("%f", &y2);
lin_len = sqrt((x2-x1)*(x2-x1) + (y2-y1)*(y2-y1));
printf("\n The length of the straight line joining the two points is %f", lin_len);
return 0;
}
Enter x-co-ordinate of first point: 2
Enter y-co-ordinate of first point: 2
Enter x-co-ordinate of second point: 6
Enter y-co-ordinate of second point: 8
The length of the straight line joining the two points is 7.211102
First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.
After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.