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iOS Object-Oriented Swift 2.0 Class Inheritance Overriding Methods

Posted by swiftlover
swiftlover
1,597 Points

Why am I getting error?

/* I've provided a base class Person in the editor below. Once an instance of Person is created, you can call getFullName() and get a person's full name.

Your job is to create a class named Doctor that overrides the getFullName() method. Once you have a class definition, create an instance and assign it to a constant named someDoctor.

For example, given the first name "Sam", and last name "Smith", calling getFullName() on an instance of Person would return "Sam Smith", but calling the same method on an instance of Doctor would return "Dr. Smith". */

class Person { let firstName: String let lastName: String

init(firstName: String, lastName: String) {
    self.firstName = firstName
    self.lastName = lastName
}

func getFullName() -> String {
    return "\(firstName) \(lastName)"
}

}

// Enter your code below

class Doctor: Person { override func getFullName() -> String {

    return "Dr. \(lastName)"
}

}

let someDoctor = Doctor.init(firstName: "Sam", lastName: "Smith").getFullName()

2 Answers

Nathan Tallack
Nathan Tallack
22,160 Points
Nathan Tallack
Nathan Tallack
22,160 Points

You were VERY close. Just a couple of bugs on your object creation. Your class was ok.

class Doctor: Person {
    override func getFullName() -> String {
        return "Dr. \(lastName)"
    }
}

// We don't call the init method, it happens automagically.
// We don't need to call the getFullName when creating the object.
let someDoctor = Doctor(firstName: "Sam", lastName: "Smith")
Chung Teng Chiang
Chung Teng Chiang
4,401 Points
Chung Teng Chiang
Chung Teng Chiang
4,401 Points

Why we don't need the super.init this time?

swiftlover
swiftlover
1,597 Points
swiftlover
swiftlover
1,597 Points

Ya thanks. Got it correct this time!