猜数字游戏

Posted 2020-10-27 云水

猜数字游戏

 

extern crate rand;

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

fn main()
{
    println!("==猜数字游戏==");
    let secret_number = rand::thread_rng().gen_range(1, 101);
    //println!("产生的加密数字为: {}", secret_number);
    loop {
        println!("请输入你的数字: ");
        let mut guess = String::new();
        io::stdin().read_line(&mut guess).expect("输入错误");
        if guess.trim().eq("quit") {
            println!("退出游戏");
            return;
        }
        println!("你输入的数字: {}", guess.trim());
        let guess: u32 = match guess.trim().parse() {
            Ok(num) => num,
            Err(_) => continue,
        };
        println!("输入的数字为: {:?}", guess);
        match guess.cmp(&secret_number) {
            Ordering::Less => println!("数字太小"),
            Ordering::Greater => println!("数字太大"),
            Ordering::Equal => {
                println!("你猜对了");
                break;
            },
        }
    }
    
}