day01

main.rs

use rand::Rng;
use std::cmp::Ordering;
use std::io;

fn main() {
    let secret = rand::thread_rng().gen_range(1..=100);
    let mut guess = String::new();

    loop {
        guess.clear();
        println!("guess: ");
        let result = match io::stdin().read_line(&mut guess) {
            Ok(count) => {
                if guess.trim().len() == 0 {
                    println!("for the love of all that is holy, enter something!");
                    continue;
                }
            }
            Err(e) => {
                println!("failed to read line! {:?}", e);
            }
        };
        let guess: u32 = match guess.trim().parse() {
            Ok(num) => num,
            Err(e) => {
                println!("error: '{}' {:?}", guess, e);
                continue;
            }
        };
        println!("you guessed: {guess}");

        match (match guess.cmp(&secret) {
            Ordering::Less => Err("colder"),
            Ordering::Greater => Err("warmer"),
            Ordering::Equal => Ok("perfect!"),
        }) {
            Ok(m) => {
                println!("{}", m);
                break;
            }
            Err(m) => {
                println!("d'oh! {}", m);
            }
        };
    }
}