# C program to calculate distance between two points

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

Updated on: 18-Oct-2019

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