Question

How to write the 7 Boom game. If a number is divided by 7 or includes the digit 7, the user writes Boom in Rust

Answer 1

// 7 Boom game. The user enters a number he wants to start the game, 
// (-1 to end the game, or lost), then the user enters numbers, from the number he entered
// If the current number is divisible by 7, or one of its digits is 7, 
// And the user did not write the word 'Boom', the user loses. 

use std::io::{self, Write};

fn contains_seven(num: i32) -> bool {
    num.to_string().contains('7')
}

fn is_boom(num: i32) -> bool {
    num % 7 == 0 || contains_seven(num)
}

fn get_user_input(prompt: &str) -> String {
    print!("{}", prompt);
    io::stdout().flush().unwrap();

    let mut input = String::new();
    io::stdin().read_line(&mut input).unwrap();
    input.trim().to_string()
}

fn process_turn(expected: i32, input: &str) -> bool {
    let lower = input.to_lowercase();
    let should_boom = is_boom(expected);

    if should_boom {
        if lower != "boom" {
            println!("{} (should be Boom)", input);
            println!("YOU LOSE!");
            return false;
        }
    } else {
        if lower == "boom" {
            println!("Wrong move! It was {}", expected);
            println!("YOU LOSE!");
            return false;
        }

        match input.parse::<i32>() {
            Ok(value) if value == expected => {}
            _ => {
                println!("Wrong move! It was {}", expected);
                println!("YOU LOSE!");
                return false;
            }
        }
    }

    true
}

fn run_game() {
    let start_input = get_user_input("Enter a number from which you want to start the game (-1 to exit): ");
    println!();
    let mut current = match start_input.parse::<i32>() {
        Ok(n) => n,
        Err(_) => return,
    };

    if current == -1 {
        return;
    }

    loop {
        let input = get_user_input("Enter a number (or Boom): ");
        println!();
        if input == "-1" {
            println!("Game Over!");
            break;
        }

        if !process_turn(current, &input) {
            break;
        }

        current += 1;
    }
}

fn main() {
    run_game();
}




/*
run:

Enter a number from which you want to start the game (-1 to exit): 6
Enter a number (or Boom): 6
Enter a number (or Boom): Boom
Enter a number (or Boom): 8
Enter a number (or Boom): 9
Enter a number (or Boom): 10
Enter a number (or Boom): 11
Enter a number (or Boom): 12
Enter a number (or Boom): 13
Enter a number (or Boom): Boom
Enter a number (or Boom): 15
Enter a number (or Boom): 16
Enter a number (or Boom): Boom
Enter a number (or Boom): 18
Enter a number (or Boom): 19
Enter a number (or Boom): 20
Enter a number (or Boom): 21
21 (should be Boom)
YOU LOSE!

*/

 

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