struct S {
  v1: f64,
  v2: f64
}

trait MyDisplay {
  fn display(&self);
}

impl MyDisplay for S {
  fn display(&self) {
    println!("This is an S({},{})", self.v1, self.v2)
  }
}

impl MyDisplay for i64 {
  fn display(&self) {
    println!("This is a 64 bit integer: {}", self)
  }
}

fn main()
{
  let s = S{v1:1.1,v2:1.1};
  //let n:i32 = 1;
  let n1 = 2;

  s.display();
  //n.display();
  n1.display()
}