To find the distance between two coordinates, we have a formula named distance formula. In this article, we will be using this where we perform subtraction first (X2 from X1 & Y2 from Y1 ) and then calculate their squares.

After getting squared values, we do add operation and find their square roots to get the distance between between the points.

Distance formula: 

C Program to Calculate Distance Between Two Points

Program:

#include<stdio.h>
#include<math.h>
int main(){
    int x1, y1, x2, y2;
    double  dis,diff1,diff2;
       printf("**********************------------------------*************************\n\n ");
 printf("Please Enter  the value of initial coordinates (x,y)\n");
 scanf("%d",&x1);
  scanf("%d",&y1);
 printf("\nPlease Enter  the value of initial coordinates (x1,y1) \n");
 scanf("%d",&x2);
 scanf("%d",&y2);
 diff1=x1-x2;
 diff2=y1-y2;
 diff1=pow(diff1,2);
 diff2=pow(diff2,2);
 dis=sqrt(diff1+diff2);
 printf("\n Distance of the line = %.2f\n",dis);
 return 0;
    }

Output:

*********************------------------------*************************

 Please Enter  the value of initial coordinates (x,y)
4
6

Please Enter  the value of initial coordinates (x1,y1) 
2
3

 Distance of the line = 3.61

Explanation :

1. Get values two coordinates as an input from the user
2. calculate difference between x₂ and x₁ & y₂ and y₁
3. Now, perform square operations on both x and y coordinates
4. Further, add both x and y squared values and find square root of the result
5. Lastly, printed the distance on output screen