extern fn printf(a: &str);

fn main() -> u32 {
  let x: A = A {
    a: 2
  };

  let y: u32 = x.hello(4);

  return y;
}

struct A {
  a: u32,
}

impl A {
  pub fn hello(self: &A, x: u32) -> u32 {
    return self.a + x;
  }
}