C++ infinite loop

Question

I am attempting to write a loop that will repeat until the user enters one of the correct choices (either 1 or 0). For some reason when I have the loop written as below it

Answer 1

(control != 0) || (control != 1)

is equivalent to,

!(control == 0 && control == 1)

but,

(control == 0 && control == 1) 

is always false (there is no such number).

Therefore, the whole expression will always get true value.