C++ cin accept only numbers

#include <iostream>
#include <limits>

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<streamsize>::max(), '\n');
    }
    while (true);

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

Source: stackoverflow.com

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