Program to find GCD or HCF of two numbers in C++

C++Server Side ProgrammingProgramming

In this tutorial, we will be discussing a program to find GCD and HCF of two numbers.

For this we will be provided with two numbers. Our task is to find the GCD or HCF (highest common factor) for those given two numbers.


 Live Demo

#include <iostream>
using namespace std;
int gcd(int a, int b){
   if (a == 0)
      return b;
   if (b == 0)
      return a;
   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;
   cout<<"GCD of "<<a<<" and "<<b<<" is "<<gcd(a, b);
   return 0;


GCD of 98 and 56 is 14
Updated on 09-Sep-2020 11:43:56