fn main() {

   #[derive(Debug)]
    enum HairColor {
        Blonde,
        Brown,
        Dark,
        Albino
    };

    #[derive(Debug)]
    struct Person {
        name: String,
        age: i32,
        hair_color: HairColor,
        id: i32,
    };

    impl Person {
        fn new(name: &str, age: i32, hair_color: HairColor) -> Self {
            Person {
                name: name.to_owned(),
                age,
                hair_color,
                id: 0
            }
        }

        fn set_id(&mut self, id: i32) {
            self.id = id;
        }
    }

    let mut persons = [
        Person::new("Snipp", 30, HairColor::Brown),
        Person::new("Snapp", 31, HairColor::Brown),
        Person::new("Snute", 32, HairColor::Blonde)
        ];

    for (index, p) in persons.iter_mut().enumerate() {
        p.set_id(index as i32 + 1);
    }
}