struct Point {
    x: f32,
    y: f32,
}


trait Display {
    fn display(&self);
}

impl Display for Point{
    fn display(&self) {
        println!("({},{})", self.x, self.y)
    }
}

impl Display for f64 {
    fn display(&self) {
        println!("Float {}", self)
    }
}

// This function receives a trait object (dynamic dispatch!)
fn f(v: &dyn Display) {
  println!("f()!!!");
  v.display()
}

fn main() {
    let p = Point{x: 1.0,y:1.0};
    let v = 6.28;

    p.display();
    f(&p);
    f(&v)
}