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Start your free trialJUNSEI TEI
2,055 PointsHELP
Can anyone help me explain a bit, what should be the parameter in override init(), and what should be the parameter in super.init(), both for this question and in general. I get confused with these concepts. And as well, why I cannot use location.x and location.y in the subclass. Does it has anything to do with my wrong override initialization?
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 init(){
super.init(location: Point1(x: 0, y: 0))
}
}
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
Steve Hunter
57,712 PointsHi there,
I don't think you need to override the init
method. Also, your func
needs to be inside the class. Then, if you remove the spaces between location.x
etc. and the increment and decrement operators; it'll work fine:
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
}
}
}
Steve.
JUNSEI TEI
2,055 PointsJUNSEI TEI
2,055 PointsThanks