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;            },        }    }    }