Calculate Distance Between Two Points in C Program

Given with the two points coordinates and the task is to find the distance between two points and display the result.

In a two dimension plane there are two points let’s say A and B with the respective coordinates as (x1, y1) and (x2, y2) and to calculate the distance between them there is a direct formula which is given below

$$\sqrt{\lgroup x2-x1\rgroup^{2}+\lgroup y2-y1\rgroup^{2}}$$

Given below is the diagram representing two points and their differences

$$\frac{(x_2-x_1)}{(x_1,y_1)\:\:\:\:\:\:(y_2-y_1)\:\:\:\:\:\:(x_2,y_2)}$$

Approach used below is as follows −

• Input the coordinates as x1, x2, y1 and y2
• Apply the formula to compute the difference between two points
• Print the distance

Algorithm

Start
Step 1-> declare function to calculate distance between two point
   void three_dis(float x1, float y1, float x2, float y2)
      set float dis = sqrt(pow(x2 - x1, 2) + pow(y2 - y1, 2) * 1.0)
      print dis
step 2-> In main()
   Set float x1 = 4
   Set float y1 = 9
   Set float x2 = 5
   Set float y2 = 10
   Call two_dis(x1, y1, x2, y2)
Stop

Example

#include <stdio.h>
#include<math.h>
//function to find distance bewteen 2 points
void two_dis(float x1, float y1, float x2, float y2) {
   float dis = sqrt(pow(x2 - x1, 2) + pow(y2 - y1, 2) * 1.0);
   printf("Distance between 2 points are : %f", dis);
   return;
}
int main() {
   float x1 = 4;
   float y1 = 9;
   float x2 = 5;
   float y2 = 10;
   two_dis(x1, y1, x2, y2);
   return 0;
}

Output

IF WE RUN THE ABOVE CODE IT WILL GENERATE FOLLOWING OUTPUT

Distance between 2 points are : 1.414214