小编Jus*_*ter的帖子

let secret_num = rand::thread_rng().gen_range(1, 101);

但在官方文档中，代码是

let secret_num = rand::thread_rng().gen_range(1..=100);

为什么它返回一个范围而不是整数。

完整代码

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

fn main() {
    let secret_num = rand::thread_rng().gen_range(1..=100);
    println!("The secret number is {}", secret_num);

    println!("Guess the Number!");

    loop {

        println!("Please input you guess: ");

        let mut guess = String::new();


        io::stdin()
            .read_line(&mut guess)
            .expect("Failed to read line");
            
        println!("You guessed: {}", guess);

        let guess: u32 = match guess.trim().parse() {
            Ok(num) => num,
            Err(_) => continue,

        };
        
        match guess.cmp(&secret_num) {
            Ordering::Less => println!("{}", "Too …