Question

[c++] Given the following simplified classes, which of the statements are not legal? Explain your answer your answer in detail.

class Pet

{

public:

    virtual void print();

    string name;

private:

};

class Dog: public Pet

{

public:

   void print();

   string breed;

};

//code below is in the main()

Dog dog;

Pet   pet;

dog.name = "rover";

dog.breed = "Collie";

a. pet = dog; cout << dog.name;

b. pet = dog; cout << dog.breed;

c. pet = dog; cout << pet.name;

d. pet = dog; cout << pet.breed;

Answer 1

The line having error is:

d. pet = dog; cout << pet.breed;

Explanation:

The class Pet is the superclass and the class Dog is the subclass. This means that Dog inherits the properties of Pet class but the vice-versa is not true, i.e., the pet class cannot inherit the properties of Dog class. Hence, Pet class cannot access the property 'breed'.