Rust 入门猜数游戏案例

use std::io;
use rand::Rng;
use std::cmp::Ordering;
fn main() {
    println!("猜数游戏");
   
    let secret_number = rand::thread_rng().gen_range(1, 101);
    println!("神秘数字是：{}", secret_number);

    loop {
        println!("猜测一个数");
        let mut guess = String::new();
        io::stdin().read_line(&mut guess).expect("无法读取行");
        let guess: u32 = match guess.trim().parse() {
            Ok(num) => num,
            Err(_) => continue,
        };
        println!("你猜测的数是：{}", guess);
        match guess.cmp(&secret_number) {
            Ordering::Less => println!("Too small"),
            Ordering::Greater => println!("Too big"),
            Ordering::Equal => println!("You win"),
        }
    }
    
}