C++ Program to Find Greatest Common Divisor (GCD) of two numbers

#include<iostream>
using namespace std;

int main() {

int first_number;
cout<<"Enter First Number : ";cin>>first_number;

int  second_number;
cout<<"Enter Second Number: ";cin>>second_number;

int  gcd;
for(int i=1;i<=first_number&&i<=second_number;i++){


     if(first_number%i==0 && second_number%i == 0 ){

                     gcd=i;

   }

}

cout<<"Greatest Common Divison (GCD):"<<gcd<<endl;
return 0;
}