The least common multiple function evaluation

Code:

#include <iostream>
using namespace std;
int gys(int x,int y)
{
    int z;
    do
    {
        z=x%y;
        x=y;
        y=z;
        cout<<"x";
    }
    while(z!=0);
    return x;
}
main()
{
    int a,b;
    cin>>a>>b;
    cout<<a*b/gys(a,b);
}