#include 
#include 

using namespace std;

main () {
    int x, y;
    // <-- NO READ HERE!

    do {
        cout << "Enter a number: ";
        if (cin >> x) break;
        cin.clear();
        cin.ignore(numeric_limits::max(), '\n');
    }
    while (true);

    // same as above, for y ...     
}