fn bmi(weight: u32, height: f32) -> &'static str {
  let bmi: f64 = (weight as f64) / (height as f64).powf(2.0);
  match bmi {
      x if x <= 18.5 => "Underweight",
      x if x <= 25.0 => "Normal",
      x if x <= 30.0 => "Overweight",
      _ => "Obese",
  }
}

#[test]
fn basic_unit_test() {
  assert_eq!(bmi(80, 1.80), "Normal");
}