use std::io;

fn main() {
    println!("Program 1\n");

    let mut x = String::new();

    let mut error = 1;
    while error != 0 {
        println!("Insert a number: ");
        io::stdin().read_line(&mut x).expect("Failed to read line!");

        println!("Entered {}", &mut x);

        let mut xx: u32 = match x.trim().parse() {
            Ok(num) => {error = 0;
                        println!("Is a number");
                        num},
            Err(_) => {error = 1;
                       println!("Not a number");
                       continue},
        };

    }

    println!("x = {}", x );



}