Failed to compile overriding empty function

Hey Noe Arzate,

You're close but you don't need to override the initializer. You're not adding any new properties to the Robot class, you're only overriding the move method. Therefore, you can use the initializer you inherit from the Machine class.

Second, for the default statement in the move method, just break and don't print anything to the console. Remember we have to use a default case here since switch statements must be exhaustive and there are limitless combinations of strings. We use break inside the default statement to state we don't want to do anything in the case of any other string.

class Point {
  var x: Int
  var y: Int

  init(x: Int, y: Int) {
    self.x = x
    self.y = y
  }
}

class Machine {
  var location: Point

  init() {
    self.location = Point(x: 0, y: 0)
  }

  func move(_ direction: String) {
    print("Do nothing! I'm a machine!")
  }

}

class Robot: Machine {

  override func move(_ direction: String) {
      switch direction {
        case "Up": location.y += 1
        case "Down": location.y -= 1
        case "Right": location.x += 1
        case "Left": location.x -= 1
        default: break
      }
  }
}

EDIT: I noticed this challenge omits the external parameter name for the move method and have updated my code to do the same. It's best not to edit the code provided by the challenge.

Good Luck