C/C++ Program to calculate GCD/HCF of two(2) numbers

//Program to calculate GCD/HCF of two(2) numbers
#include<iostream>
using namespace std;
int main()
{
int a,b,gcd=1;
cout<<"\n enter 1st number:";
cin>>a;
cout<<"\n enter 2nd number:";
cin>>b;
for(int i=1;i<=a && i<=b;i++)
        {
            if(a%i==0 && b%i==0)
                gcd=i;
        }
cout<<"GCD of "<<a<<" and "<<b<<" is "<<gcd<<endl;
return 0;
}