FACULTY OF COMPUTER SCIENCE AND ENGINEERING
CS112L Object Oriented Programming
Lab Final
Task : Inheritance
Imagine a publishing company that markets both book and audiocassette versions of its works. Create a
class publication that stores the title (a string) and price (type float) of a publication. Add another base
class sales that holds an array of three floats so that it can record the dollar sales of a particular
publication for the last three months.
From these base classes derive two classes: book, which adds a page count (type int), and tape, which
adds a playing time in minutes (type float).
Assume that the publisher decides to add a third way to distribute books: on computer disk, for those
who like to do their reading on their laptop. Add a disk class that, like book and tape, is derived from
publication. The disk class should incorporate the same member functions as the other classes. The data
item unique to this class is the disk type: either CD or DVD. Use an enum type to store this item. The
user could select the appropriate type by typing c or d.
Each of these classes should have a getdata() function to get its data from the user at the keyboard,
and a putdata() function to display its data.
Write a main() program to test the book , tape and disk classes by creating instances of them and
exercise their input/output capabilities.