69 lines
1.5 KiB
Rust
69 lines
1.5 KiB
Rust
use rand::Rng;
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use std::cmp::Ordering;
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use std::io;
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pub struct Guess {
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value: i32,
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}
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impl Guess {
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pub fn new(value: i32) -> Guess {
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if value < 1 {
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panic!(
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"Guess value must be greater than or equal to 1, got {value}."
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);
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} else if value > 100 {
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panic!(
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"Guess value must be less than or equal to 100, got {value}."
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);
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}
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Guess { value }
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}
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}
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fn main() {
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println!("Guess the number!");
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let secret_number = rand::thread_rng().gen_range(1..=100);
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println!("The secret number is: {secret_number}");
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loop {
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println!("Please input your guess.");
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let mut guess = String::new();
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io::stdin()
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.read_line(&mut guess)
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.expect("Failed to read line");
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let guess: Guess = match guess.trim().parse() {
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Ok(num) => Guess::new(num),
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Err(_) => {
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println!("Please type a number!");
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continue;
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},
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};
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println!("You guessed: {}", guess.value);
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match guess.value.cmp(&secret_number) {
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Ordering::Less => println!("Too small!"),
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Ordering::Greater => println!("Too big!"),
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Ordering::Equal => {
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println!("You win!");
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break;
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},
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}
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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#[should_panic(expected = "less than or equal to 100")]
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fn greater_than_100() {
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Guess::new(200);
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}
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}
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