p_rust 0.1.0

My rust practice
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58

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

struct Guess {
    value: i32
}

impl Guess {
    fn new(input: &String) -> Option<Guess> {
        let value: i32 = match input.trim().parse() {
            Ok(num) => num,
            Err(_) => return None
        };

        if value < 1 || value > 100 {
            println!("Guess value must be between 1 and 100, got {}.", value);
            return None;
        }
        Some(Guess { value })
    }

    fn value(&self) -> i32 {
        self.value
    }
}

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

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

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

        let mut guess = String::new();

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

        let guess = match Guess::new(&guess) {
            Some(guess) => guess.value(),
            None => continue
        };

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

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