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 trialBartosz Kulasiewicz
1,130 PointsHELP ME PLEASE
In the editor you've been provided with two classes: Point to represent a coordinate point, and Machine. The machine has a move method that doesn't do anything.
Your task is to subclass Machine and create a new class named Robot. In the Robot class, override the move method and provide the following implementation:
If you enter the string "Up" the y coordinate of the Robot's location increases by 1. "Down" decreases it by 1. If you enter "Left", the x coordinate of the location property decreases by 1 while "Right" increases it by 1.
Note: If you use a switch statement you can use the break statement in the default clause to exit the current iteration.
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 am a machine!")
}
}
class Robot: Machine{
override init() {
super.init()
}
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
}
}
}
1 Answer
Joseph Heydorn
iOS Development with Swift Techdegree Graduate 11,421 PointsHello Bartosz! You're so close to finishing the task! In your override func method, you were simply missing the "_" before direction! Below is the correct code! One thing I suggest is to try out the code inside of a swift playground. I found that this helps to understand the errors a lot better. Good luck and happy coding!
class Robot: Machine{
override init() {
super.init()
}
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
}
}
}