Im trying to get the greatest common factor for 2 numbers
you have the user enter the first number
then you have the second entered by the user
this is my basic formula and i haven't been doing this for a while so any help would be greatly appreciated.


All I really need is a basic formula to get it to work

#include<iostream.h>
int main()
{
int first,second;
cout<<"Enter the first number ";
cin>>first;
cout<<"Enter the second number ";
cin>>second;

if (first==second || second==first)
cout<<"The Greatest Common Factor is "<<second<<endl;

if(first>second)
cout<<"The Greatest Common Factor is " <<

if(second>first)
cout<<"The Greatest Common Factor is " <<

return(0);
}