While循环无法识别输入

Question

I'm at a loss of what to do here. So I have this simple while loop meant to allow a user to re-input a number if they accidentally give an incorrect input. The issue is, if you input "2" it loops back again. I can't, for the life of me figure it out.

void Player::playerPick()
{
    int selection = 0;
    while (selection != (1 || 2))
    {
        cout << "Player 1 or Player 2 (Type [1] or [2])";
        cin >> selection;
    }
}

Answer 1

You wrote:

while (selection != (1 || 2))

This is "while selection is not one or two".

The actual correct English is "while selection is neither one nor two", and that's true in C++ also:

while (!(selection == 1 || selection == 2))

Or, simpler, "while selection is not one, and selection is not two":

while (selection != 1 && selection != 2)

The expression 1 || 2 1 || 2 evaluates to true , so you wrote while (selection != true) , which is the case for any non-zero value of selection .