Rust，重温猜猜看

其实，这个知识点蛮多的，

常看常新。

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

fn main() {
    println!("Guess the number!");
    let secret_number = rand::thread_rng().gen_range(1, 101);
    println!("The secret number is: {}", secret_number);
    loop {
        println!("Please input your guess.");

        let mut guess = String::new();

        io::stdin().read_line(&mut guess)
            .expect("Failed to read line");
        let guess: u32 = match guess.trim().parse() {
            Ok(num) => num,
            Err(_) => continue,
        };

        println!("You guessed: {}", guess);

        match guess.cmp(&secret_number) {
            Ordering::Less => println!("To small!"),
            Ordering::Greater => println!("To Big!"),
            Ordering::Equal => {
                println!("You win!");
                break;
            }
        }
    }

}