condition not working, can anyone explain why that is?

Question

I just started learning C++ so i’m sure there is something obvious about this that i’m missing. I would love it if somebody could enlighten me. thank you!

Im trying

Answer 1

I would had parenthesis:

do { 
    std::cin>>answer 
} while ((std::toupper(answer) != 'N') && (std::toupper(answer) != 'Y'));

Operators have precedence and it may introduce subtle errors not to mention when using beta compiler.