[RUST/RAND] ThreadRng 구조체 : gen_range 메소드를 사용해 숫자 맞추기 게임 만들기

■ ThreadRng 구조체의 gen_range 메소드를 사용해 임의의 난수를 생성하고 숫자를 맞추는 게임을 만드는 방법을 보여준다.

▶ Cargo.toml


[package]
name = "test_project"
version = "0.1.0"
edition = "2021"

[dependencies]
rand = "0.8.0"

[package]

name = "test_project"

version = "0.1.0"

edition = "2021"

[dependencies]

rand = "0.8.0"

▶ src/main.rs


use std::cmp;
use std::io;

use rand;
use rand::rngs;
use rand::Rng;

fn main()
{
    println!("Guess the number!");

    let mut thread_rng: rngs::ThreadRng = rand::thread_rng();

    let secret_number : u32 = thread_rng.gen_range(1..=100);

    loop
    {
        println!("Please input your guess.");

        let mut guess_string : String = String::new();

        io::stdin().read_line(&mut guess_string).expect("Failed to read line");

        let guess_number : u32 = match guess_string.trim().parse()
        {
            Ok(number) => number,
            Err(_)          => continue
        };

        println!("You guessed : {}", guess_number);

        match guess_number.cmp(&secret_number)
        {
            cmp::Ordering::Less    => println!("Too small!"),
            cmp::Ordering::Greater => println!("Too big!"),
            cmp::Ordering::Equal   =>
            {
                println!("You win!");

                break;
            }
        }
    }
}

use std::cmp;

use std::io;

use rand;

use rand::rngs;

use rand::Rng;

fn main()

{

println!("Guess the number!");

let mut thread_rng: rngs::ThreadRng = rand::thread_rng();

let secret_number : u32 = thread_rng.gen_range(1..=100);

loop

{

println!("Please input your guess.");

let mut guess_string : String = String::new();

io::stdin().read_line(&mut guess_string).expect("Failed to read line");

let guess_number : u32 = match guess_string.trim().parse()

{

Ok(number) => number,

Err(_) => continue

};

println!("You guessed : {}", guess_number);

match guess_number.cmp(&secret_number)

{

cmp::Ordering::Less => println!("Too small!"),

cmp::Ordering::Greater => println!("Too big!"),

cmp::Ordering::Equal =>

{

println!("You win!");

break;

}

test_project.zip