std::cin doesn't throw an exception on bad input

Question

I am just trying to write a simple program that reads from cin, then validates that the input is an integer. If it does, I will break out of my while loop. If not, I will as

Answer 1

C++ iostreams don't use exceptions unless you tell them to, with cin.exceptions( /* conditions for exception */ ).

But your code flow is more natural without the exception. Just do if (!(cin >> input)), etc.

Also remember to clear the failure bit before trying again.

The whole thing can be:

int main()
{
    int input;
    do {
       cout << "Please enter an integral value \n";
       cin.clear();
       cin.ignore(std::numeric_limits::max(), '\n');
    } while(!(cin >> input));
    cout << input;
    return 0;
}