Why am I getting an Infinite loop when validating my user input?

Question

I'm trying to validate the user inputs. If the user inputs anything but an integer it should stay in the While loop. But when I give the program a "w" for instance the program just endlessly prints "Please input integer" and I have to stop the program.

int MAns1 = 0
while (!(cin >> MAns1))
{
    cout << "\nPlease Enter An Integer: ";
    cin.clear();
}

Answer 1

Because you should be testing (cin >> MAns1), not !(cin >> MAns1). I would do something like this though:

#include<iostream>
using std::cin;
using std::cout;

int main() { 
    int MAns1 = 0;
    for (;;)
    {
        cout << "\nPlease Enter An Integer: ";
        cin >> MAnsi;

        // did the last read succeed?
        if(!cin) {
          // it did *not* succeed.
          break;
        }
    }
}