use std::fmt::format;

trait Printable {
    fn format(&self)->String;
}

impl Printable for i32{
    fn format(&self) -> String {
        format!("i32: {}",*self)
    }
}

impl Printable for String{
    fn format(&self) -> String {
        format!("string: {}",*self)
    }
}
fn print_it<T:Printable>(z:T){
    println!("{}",z.format())
}
fn print_it2(z:&Printable){
    println!("{}",z.format());
}

fn main() {
    let a =123;
    let b="merhaba".to_string();

    println!("{}",a.format());
    println!("{}",b.format());

    //print_it(a);
    //print_it(b);

    print_it2(&a);
    print_it2(&b);


}