C program to Find the Distance Between Two Points

Write a C program to find the distance between two points. As per the Pythagoras theorem, the distance between two points, i.e., (x1, y1) and (x2, y2), is √(x2 – x1)² + (y2 – y1)².

This example accepts two coordinates and prints the distance between them. We used the C library Math functions sqrt and pow to calculate the square root and power.

#include <stdio.h>
#include<math.h>

int main()
{   
    int x1, x2, y1, y2, dtn;
    
    printf("Enter the First Point Coordinates   = ");
    scanf("%d %d",&x1, &y1);

    printf("Enter the Second Point Coordinates  = ");
    scanf("%d %d",&x2, &y2);

    int x = pow((x2- x1), 2);
    int y = pow((y2- y1), 2);
    
    dtn = sqrt(x + y);

    printf("\nThe Distance Between Two Points = %d\n", dtn); 
}

In this C program, the calcDis function accepts the coordinates of two points and returns the distance between those two points.

#include <stdio.h>
#include<math.h>

int calcDis(int x1, int x2, int y1, int y2)
{   
    return sqrt((pow((x2- x1), 2)) + (pow((y2- y1), 2)));
}
int main()
{   
    int x1, x2, y1, y2;
    
    printf("Enter the First Coordinates   = ");
    scanf("%d %d",&x1, &y1);

    printf("Enter the Second Coordinates  = ");
    scanf("%d %d",&x2, &y2);

    printf("\nThe Distance = %d\n", calcDis(x1, x2, y1, y2)); 
}

Enter the First Coordinates   = 2 3
Enter the Second Coordinates  = 9 11

The Distance = 10