#![allow(unused)]
macro_rules! five_times {
    (
      $($x:expr), *) => {
        {let mut no = 5;
        $(
          no = no + $x;
        )*
        no
    }
    };
}


fn main() {

    struct User {
        name: String,

    }

    let mut array:[i32; 50] = [0; 50];
    println!("Hello, world! {:?}, {:?}", array[0], array[array.len() - 1]);
    let _test_user = User {
        name: String::from("test_user")
    };
    let _t = (1, 2);
    f_fn(&mut array);
    println!("{:?} user {:#?}, tupple {:#?}", array[0], _test_user.name, five_times!(5+10));

}

fn f_fn(_array: &mut [i32]) {
let new_str = "New STR";
    println!("this is fn {:?}", new_str);
    _array[0] = 100;
}