Program to find HCF (Highest Common Factor) of 2 Numbers in C++

In this tutorial, we will be discussing a program to find HCF (highest common factor) of two numbers.

For this we will be provided with two numbers. Our task is to find the highest common factor (HCF) of those numbers and return it.

Example

Live Demo

#include <stdio.h>
//recursive call to find HCF
int gcd(int a, int b){
   if (a == 0 || b == 0)
      return 0;
   if (a == b)
      return a;
   if (a > b)
      return gcd(a-b, b);
   return gcd(a, b-a);
}
int main(){
   int a = 98, b = 56;
   printf("GCD of %d and %d is %d ", a, b, gcd(a, b));
   return 0;
}