struct Boat {
    make : String,
    length : u32,
    horsepower : u32,
}
impl Boat {
    fn print(&self) {
        println!("Make: {}\nModel: {}\nHorsepower: {}\n", self.make, self.length, self.horsepower);
    }
}

use std::collections::HashMap;

fn make_boat_in_box(){
    let mut b = Box::new(Boat {make: "Bayliner".to_string(), length: 17, horsepower: 120});
    b.print();
    b.length = 25;
    b.print();
}

fn main(){
    make_boat_in_box();
//    let mut trees : HashMap<&str, Boat> = HashMap::new();
    let mut trees = HashMap::new();
    trees.insert("Fiberform", Boat {make: "Fiberform".to_string(), length: 18, horsepower: 160});
    trees.insert("Giant", Boat {make: "American".to_string(), length: 21, horsepower: 260});

    for (key, value) in trees {
        println!("{}:", key);
        value.print();
    }

    let x;
    x = 347;
    println!("x = {}", x);
}