Obtaining a Y/N response from the keyboard

Question

I would like to ask the user to respond to a question with Y or N. Basically, I have no idea what I'm doing, but here's my attempt anyway

fn ask_confirm(question: &str) -> bool {
    println!("{}",question);
    loop {
        match std::io::stdin().read_u8().map(|x| x as char) {
            Ok('y') | Ok('Y') => return true,
            Ok('n') | Ok('N') => return false,
            Ok(_) => println!("y/n only please."),
            Err(e) => ()
        }
    }
}

This causes an infinite loop. The Err(e) reads "unknown error (OS Error 8 (FormatMessageW() returned error 15105))" on Win 7. Input isn't recognized regardless.

Answer 1

I can't find a read_u8 method. I used the logic I answered in this question. Unlike in the previous question since you know that you only want Y, or N this method should work without worry. however input like \sy where \s is space will cause this method to fail.

fn ask_confirm(question: &str) -> bool {
    println!("{}",question);
    loop {
        let mut input = [0];
        let _ = std::io::stdin().read(&mut input);
        match input[0] as char {
            'y' | 'Y' => return true,
            'n' | 'N' => return false,
            _ => println!("y/n only please."),
        }
    }
}