Question

16. In the spaces below, provide source code to the following questions. (a) [5 points) Declare a class Book with two protected data members, n..pages, which is a posi- tive integer, and price which is a floating point value. Include 3 constructors (default, copy constructor, and a constructor that receives two parameters). Additionally, include a print method as well.

Answer 1

a)

class Book
{
protected:
int n_pages;
float price;
public:
Book();//default constructor
Book(int,float);//parameterized constructor
Book(Book&);//copy constructor
void print();
};

b)

Book::Book(){}
Book::Book(int n_pages,float price)
{
this->n_pages=n_pages;
this->price=price;
}
Book::Book(Book& book)
{
this->n_pages=book.n_pages;
this->price=book.price;
}

c)

void Book::print()
{
cout<<n_pages<<price<<endl;
}

d)

class Dictionary:public Book //dictionary getting properties from Book class
{
string language;
public:
Dictionary(int,float,string);
void print();
};

e)

Dictionary::Dictionary(int n_pages,float price,string language):Book(n_pages,price) //passing parameters to constructor of base class
{
this->language=language;
}

f)

void Dictionary::print()
{
cout<<n_pages<<price<<language<<endl;
}

It can also be written in another way

void Dictionary::print()
{
Book::print();
cout<<language<<endl;
}