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iOS Build a Simple iPhone App with Swift 2.0 Getting Started with iOS Development Swift Recap Part 2

Måns Englund
Måns Englund
2,069 Points

Can someone please tell me why my code doesn't work...?

I wonder what I've done wrong because I can't find the error...

classes.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!")
    }
}

// Enter your code below

class Robot: Machine{

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

  default: break
   }
  }
}

1 Answer

Jhoan Arango
Jhoan Arango
14,575 Points

Hello:

You have a very very simple and easy to fix mistake. It's very easy to overlook at these things when you are a beginner on a particular language.

All you have to do to fix your code is delete the spaces...

// Enter your code below

class Robot: Machine{

  override func move(direction: String){
   switch direction{
   case "Up": location.y ++ // Delete these spaces, should be location.y++
   case "Down": location.y --
   case "Left": location.x --
   case "Right": location.x ++

  default: break
   }
  }
}

Good luck.