Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

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

Ayub Ali
seal-mask
.a{fill-rule:evenodd;}techdegree
Ayub Ali
Front End Web Development Techdegree Student 10,462 Points
Posted by Ayub Ali
.a{fill-rule:evenodd;}techdegree
Ayub Ali
Front End Web Development Techdegree Student 10,462 Points

Hello I tried the quiz but it isn't giving me a preview anymore. It just says compiler error

Okay here is my code

class Point { var x: Int var y: Int

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

} enum Direction { case Left case Right case Up case Down }

class Machine { var location: Point

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

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

I am pretty sure that I am correct. I went through the teamtreehouse iOS forms and it seems almost everybody was having the same problem.

However every time I run this code the compiler just gives me an compiler error, but there is no output? So I am unsure how to fix my error Does anybody know a way around this glitch?

Thanks

robots.swift 
class Point {
    var x: Int
    var y: Int

    init(x: Int, y: Int){
        self.x = x
        self.y = y
    }
}
enum Direction {
    case Left
    case Right
    case Up
    case Down
}

class Machine {
   var location: Point

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

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

1 Answer

Jeff McDivitt
Jeff McDivitt
23,970 Points
Jeff McDivitt
Jeff McDivitt
23,970 Points

It is not a glitch it looked as they you removed the underscore before 

class Point {
    var x: Int
    var y: Int

    init(x: Int, y: Int){
        self.x = x
        self.y = y
    }
}
enum Direction {
    case Left
    case Right
    case Up
    case Down
}

class Machine {
   var location: Point

   init() {
            self.location = Point(x: 0, y: 0)
        }
//Here 
   func move(_ direction: String) {
            print("Do nothing! Im a machine!")
        }
    }

class Robot: Machine {
//and here
 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
    }
  }
}