记录自学rust语言（1）

 

这是一个用rust编写的猜数字游戏。

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

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!("Too small!"),
            Ordering::Greater => println!("Too big!"),
            Ordering::Equal =>{
                println!("You win!");
                break;