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.

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Program:

/*
 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;
} 

Output:

 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 

Explanation:

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