divination.rs

// based on https://github.com/vit0rr/jogo-da-adivinhacao

//extern crate rand;
//use rand::Rng;
use std::cmp::Ordering;
use std::io;

fn read_guess() -> u32 {
    return loop {
        let mut guess = String::new();
        io::stdin()
            .read_line(&mut guess)
            .expect("Error to read entry");
    
        match guess.trim().parse() {
            Ok(num) => break num,
            Err(_) => /* continue */break 13,
        };
    }
}

fn divination_game(attempts: u32, secret_number: u32) {
    println!("attempt: {:?}", attempts);
    println!("Type your guess!");
    let guess: u32 = read_guess();

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

    match guess.cmp(&secret_number) {
        Ordering::Less => println!("Less!"),
        Ordering::Greater => println!("Greater!"),
        Ordering::Equal => {
            println!("Right! You played {} times", attempts);
            return;
        }
    }
    if attempts > 3 {
        return;
    } else {
        divination_game(attempts + 1, secret_number);
    }
}

fn main() {
    println!("guess the number!");
    let secret_number = 42;//rand::thread_rng().gen_range(1, 101);
    divination_game(1, secret_number);
}

divination_gambfree.rs

// based on https://github.com/vit0rr/jogo-da-adivinhacao

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

fn read_guess() -> u32 {
    return loop {
        let mut guess = String::new();
        io::stdin()
            .read_line(&mut guess)
            .expect("Error to read entry");
    
        match guess.trim().parse() {
            Ok(num) => break num,
            Err(_) => continue,
        };
    }
}

fn divination_game(attempts: u32, secret_number: u32) {
    println!("attempt: {:?}", attempts);
    println!("Type your guess!");
    let guess: u32 = read_guess();

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

    match guess.cmp(&secret_number) {
        Ordering::Less => println!("Less!"),
        Ordering::Greater => println!("Greater!"),
        Ordering::Equal => {
            println!("Right! You played {} times", attempts);
            return;
        }
    }
    divination_game(attempts + 1, secret_number);
}

fn main() {
    println!("guess the number!");
    let secret_number = 42;//rand::thread_rng().gen_range(1, 101);
    divination_game(1, secret_number);
}