What are the valid values of the expression (uninitialized_bool ? 1 : 2)?

Question

What is the set of valid outputs for the following, according to the standard?

bool x;
cout << (x ? 1 : 2);

edit: unknown(google) has got it. In gcc my code was crashing because of sprite.setFrame(isPressed ? 0 : 1) with the conditional returning 28!

Answer 1

If x is uninitialized, it can be both true or false. So the valid outputs are 1 or 2.

Answer 2

Using a uninitialised variable is undefined.So anything can happen

Answer 3

"++?????++ Out of Cheese Error. Redo From Start."

Answer 4

Using a bool value in ways described by This Standard as "undefined" such as by examining the value of an unitialized automatic variable, might cause it to behave as it is neither true or false.

Welcome to the world of undefined behaviour. But first, why would you want to do that?

Answer 5

Anything can happen, including fireTheMissiles().