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Start your free trialMargarita Garmutė
2,136 PointsCan anyone help me with subclassing and inherence.
Can't understand what's wrong.
Thanks for help.
class Vehicle {
var numberOfDoors: Int
var numberOfWheels: Int
init(withDoors doors: Int, andWheels wheels: Int) {
self.numberOfDoors = doors
self.numberOfWheels = wheels
}
}
// Enter your code below
class Car : Vehicle {
var numberOfSeats: Int = 4
convenience init(withDoors doors: Int, andWheels wheels: Int, withSeats seats: Int) {
self.init(withDoors: 5, andWheels: 4, withSeats: 4)
self.numberOfSeats = seats
}
}
let someCar = Car(withDoors: 5, andWheels: 4, withSeats: 4)
2 Answers
Jeff McDivitt
23,970 PointsYou are not a need for the initialization in the Car class, the below is what the task is asking for:
class Vehicle {
var numberOfDoors: Int
var numberOfWheels: Int
init(withDoors doors: Int, andWheels wheels: Int) {
self.numberOfDoors = doors
self.numberOfWheels = wheels
}
}
class Car: Vehicle {
var numberOfSeats: Int = 4
}
let someCar = Car(withDoors: 4, andWheels: 4)
However if you did need to override the initialization you would do it like below
class Vehicle {
var numberOfDoors: Int
var numberOfWheels: Int
init(withDoors doors: Int, andWheels wheels: Int) {
self.numberOfDoors = doors
self.numberOfWheels = wheels
}
}
class Car: Vehicle {
var numberOfSeats: Int
override init(withDoors doors: Int, andWheels wheels: Int) {
self.numberOfSeats = 4
super.init(withDoors: 4, andWheels: 4 )
}
}
let someCar = Car(withDoors: 4, andWheels: 4)
Margarita Garmutė
2,136 PointsThank you, Jeff!