CS12, Program 5

Assigned: November 29^th, 2001

Due: December 9^th, 2001, 11pm

Topics

· Inheritance

· Operator overloading

· More practice with Unix and makefiles

Background

In several of the labs this quarter, you worked with the Time class that appears in chapters 6 and 7 of your book. In this assignment, you will inherit another class from this class.

To Do

Start with one of the versions of the time class from the book (time3, on pages 423--424, or time5, pages 455--457). Put your class in a files called time.h and time.cc, and call the class Time.

Write another class, ZonedTime, that inherits from the Time class, but also contains an additional private member, time_zone. For the purposes of this assignment, implement only the four time zones of the continental US: Easter, Central, Mountain and Pacific. Write a constructor for your class that will allow you to set both the time and the time zone for an object.

Override the print methods of this class so that they print the time zone as well as military time.

Overload the equality comparison operator (==) for the ZonedTime class to compare two ZonedTime objects and see if they show the same time. For example, 09:13:46 Eastern is the same time as 06:13:46 Pacific, but 20:15:00 Central is not the same time as 20:15:00 Pacific.

Write a short main program that tests your Time and ZonedTime classes. Initialize some objects of each class and print them out using the << operator. Then compare some ZonedTime objects to see if your == operator is functioning properly.

What to turn in

· time.h

· time.cc

· zonedtime.h

· zonedtime.cc

· main.cc

· A makefile that will compile the program when the user types "make all", creating an executable called "run".