NWD

#include <iostream>
#include <windows.h>
using namespace std;
int a, b;
int main()
{
    cout << "Podaj liczbe A:" << endl;
    cin >> a;
    cout << "Podaj liczbe B:" << endl;
    cin >> b;

    while (a != b)
    {
        if (a > b)
        {
            a -= b;
        }

        else
        {
            b -= a;
        }
    }
    cout << "NWD tych liczb wynosi: " << a << endl;

    system("pause");

    return 0;
}