cin validation loop

cinValidate.cpp

int x; // example input variable

cout << "Enter x: "
// Get the input and validate it, check if outside of range
while ((!(cin >> x)) || /* && could be used here too, on nothing else */ (x < 999))
{
    cin.clear();     // Clear the error flags
    cin.ignore(100, '\n');    // Remove unwanted characters from buffer
    cout << "\aEnter x: ";   // Sound alert and re-issue the prompt
}