struct S {
  v: i32
}

fn larger(v1: &S, v2: &S) -> &S
{
  if v1.v > v2.v {
    v1
  } else {
    v2
  }
}

fn main()
{
  let s1 = S{v:4};
  let s2 = S{v:1};
  let s3 = larger(&s1, &s2);

  println!("{} {} -> {}", s1.v, s2.v, s3.v)
}