PRACTICE PROBLEM 5: Price of book and CD/DVD

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void learning_Material::get()

{

cin>>isbn;

cin>>title;

cin>>author;

cin>>year;

}

void learning_Material::print()

{

cout<<isbn<<endl;

cout<<title<<endl;

cout<<price;

}

class book:public learning_Material

{

int pages;

public:

void get()

{

learning_Material::get();

cin>>pages;

}

void print()

{

learning_Material::print();

}

void calc_Price()

{

price=pages;

}

};

class CD:public learning_Material

{

int min;

public:

void get()

{

learning_Material::get();

cin>>min;

}

void print()

{

learning_Material::print();

}

void calc_Price()

{

price=min*2;

}

};