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irem gürel
5,732 PointsI dont know what is wrong
class Robot: Machine{ override init(x: Int, y: Int) { super.init(x: x, y: y) } override func move(_ direction: String) { switch(direction){ case "Up": self.y+=1 case "Down": self.y-=1 case "Left": self.x-=1 case "Right":self.x+=1 default:break } }
}
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 init(x: Int, y: Int) {
super.init(x: x, y: y)
}
override func move(_ direction: String)
{
switch(direction){
case "Up": self.y+=1
case "Down": self.y-=1
case "Left": self.x-=1
case "Right":self.x+=1
default:break
}
}
}
1 Answer
Charles Kenney
15,604 PointsAt least for the challenge you linked, you do not have to modify the parent init method. You only need to override the move method. You should be changing the x/y values of the inherited property 'location' (self.location.x/self.location.y), as there are no self.x or self.y properties with Robot. This is what your object should look like:
class Robot: Machine {
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
}
}
}
Hope this helps,
Charles