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Start your free trialDuong Nguyen
3,292 PointsPlease tell me what I did wrong for this enumeration code challenge?
I tried to follow the directions and examples, but it didn't work. Where did I go wrong?
In the editor below you have two objects - classes named Point and Robot. The Robot stores its location as a point instance and contains a move function.
The task of this challenge is to complete the implementation for move. Move takes a parameter of type Direction which is an enumeration listing the possible movement directions.
When you tell the robot to move up (by specifying Direction.Up as the argument), the y coordinate should increase by 1. Similarly moving down means the y coordinate decreases by 1, moving right means the x coordinate increases by 1 and finally left means x decreases by 1.
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 Robot {
var location: Point
init() {
self.location = Point(x: 0, y: 0)
}
func move (direction: Direction) {
// Enter your code below
switch direction {
case .left: return location.x -= 1
case .right: return location.x += 1
case .up: return location.y += 1
case .down: return location.y -= 1
}
}
}
3 Answers
Martel Storm
4,157 PointsYour answer is already correct buddy! Good job
switch direction {
case .left: return location.x -= 1
case .right: return location.x += 1
case .up: return location.y += 1
case .down: return location.y -= 1
}
}
}
Duong Nguyen
3,292 PointsThank you, may be something was wrong with the system. Now it worked for me ^^
stevenblasi
16,101 PointsFor future people having problems: I had a problem with entering too and I found a bracket missing. If you are doing your challenges in a Playground page, make sure the brackets are copied for the switch statement.