CECS 274 Programming and Problem Solving II
Assignment 2
Purpose:
To introduce you to the use of C++ classes as abstract data types (ADTs) and make sure you can
use functions, structs and I/O in C++. You must also design and manipulate a simple data
abstraction for representing time on a 24-hour clock.
Problem:
Write a C++ class called clock which implements an ADT for a 24-hour clock.
Design and implement clock so that it represents the time of day. Represent the time as hours,
minutes and seconds on a 24-hour clock. The hours, minutes and seconds are the private data
members of the class that implements the ADT.
Include at least two initialization operations: one that provides a default value for the time, and
another that sets the time to a client-supplied value. These operations are the class’ constructors.
Include the following operations:
setClock -- sets the time
incrSeconds -- increase the present time by a number of seconds
print12hr -- display the time in 12-hour notation
print24hr -- display the time in 24-hour notation
timeDiff -- a friend function that returns the difference in time between two objects of
the type Clock. The parameters to timeDiff will be two objects of type Clock. timeDiff
returns the difference in seconds.
isEarlier -- a friend function that returns the True if the first object of type Clock occurs
before the second object of the type Clock. The parameters to isEarlier will be two
objects of type Clock. isEarlier returns False otherwise.
You will be provided with a main program that tests your package.
Submissions:
Due Wednesday, September 13: Program Specifications and Initial Documentation
Turn in your specifications for a modular design of this program. You should include program
documentation and specifications for each function you will be using. Please see the class
handout on program documentation. Note: Spelling and grammar are important.
Due Wednesday, September 20: Completed C++ Program
Turn in your completed C++ program during lab. You will be asked to demonstrate your
program, and a simple quiz will be given on the basics of the program.
Dr. Tracy Bradley Maples