The challenge will not let me see anything in the Preview window. It says that my code will not compile.

Question

So can you fix this so that I can 'see' the errors being returned? It works in xCode.

// code challenge ------------------------------------------------------------- class Point99 { var x: Int var y: Int

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

}

class Machine { var location: Point99

init() {
    self.location = Point99(x: 0, y: 0)
}

func move(direction: String) {
    print("Do nothing! Im a machine!")
}

}

// Enter your code below

class Robot: Machine {

override init() {
    super.init()
    }

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

}//end of subclass Robot

robots.swift

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 "Left": location.x -= 1
      case "Right": location.x += 1
      default: break
    }
  }
}

Answer 1 · 2017-03-25T14:37:43Z

March 25, 2017 2:37pm

Looks as though you altered the original direction function should be ( _ direction) not (direction)

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 "Left":
            location.x -= 1
        case "Right":
            location.x += 1
        default:
            break
        }
    }
}

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timothyboehm

timothyboehm

The challenge will not let me see anything in the Preview window. It says that my code will not compile.

1 Answer

Jeff McDivitt

Jeff McDivitt