Algorithm to get distance between two points?

The algorithm to find the distance between two points is as follows.

#include <bits/stdc++.h>
Using namespace STD;
// Calculation of the distance
float distance(int x1, int y1, int x2, int y2)
 { 
  // calculating the distance 
return sqrt(pow(x2 - x1, 2) + 
pow(y2 - y1, 2) * 1.0);
 }
// Code of the Drivers
int main()
{
cout << distance(3, 4, 4, 3);
return 0;
 }