CISC 2000
Inheritance
Lab Assignment #6
30 points
Professor Papadakis
The purpose of this lab is to practice implementing classes using Inheritance in C++. The
assignment is to simulate a package delivery service, such as FedEx, DHL or UPL. The program
should offer two shipping (i.e. packaging) options; two day delivery and overnight delivery.
Each of these two services will have a specific cost associated with it which will determine the
cost of sending the package. To accomplish the assignment you will need to create the following
inheritance hierarchy to represent the types of packages:
Base class: Package
Derived Class: OverNightPackage
Dervied Class: TwoDayPackage
1. The class Package will be used as the base class and should include at least the following
attributes:
 Information for both the sender and the recipient
 Name
 Address
 City
 State
 Zip code
Think about creating an independent class Customer to contain the required information
for the sender and recipient. Declare two objects sender and recipient in the Package
class to be objects of this class. In other words Package” has a” sender and a recipient
so they are composition objects of Package. Although this may sound like extra work, it
will actually simplify the coding of the Package Class.
 Information for the package being sent. Note that this information should be correct
(e.g. no negative numbers):
 Weight of the package (in ounces)
 Cost per ounce to ship the package
as well as the following behaviors:
 Member function calculateCost that calculates and returns the cost of sending the
package as (weight*cost per ounce).
 Data Member mutator (i.e. set) and accessor (i.e. get) functions (as necessary)
 Member function(s) to get (and set) the recipient and sender information.
Note: this would be a member function in the Customer class if
one is created.
 A Function print() to print the Sender and Recipient Information.
CISC 2000
Inheritance
Lab Assignment #6
30 points
Professor Papadakis
2. From class Package, derive two classes: TwoDayPackage and OverNightPackage. These
derived classes should inherit all the functionality of the base class and additionally provide
at least the following enhancements:
Class TwoDayPackage should include:
 An attribute to represent a flat fee that is charged for sending a package using twoday service. This fee should be passed to the constructor and initialized when the
object is created.
 A member function calculateCost() that overwrites the base classes’ member
function and calculates the cost of sending the package using this service by adding
the flat fee to the weight based cost.
 Accessor and mutator functions as necessary.
 A function print() that prints the sender and recipient information, any attributes
associated with this package as well as the cost associated with sending this package.
Class OverNightPackage should include:
 an attribute to represent an additional fee per ounce charged for using overnightdelivery service. This fee should be passed to the constructor and initialized when
the object is created.

a member function calculateCost() that overwrites the base classes’ member function
and calculates the cost of sending the package using this service by adding the
additional fee per ounce to the standard weight based cost.
 Accessor and mutator functions as necessary.
 A function print() that prints the sender and recipient information, any attributes
associated with this package as well as the cost associated with sending this package.
3.
Write a driver program that creates objects of each type of package and tests the member
function calculateCost() for each type of delivery service.
4. After the functionality of the base and derived classes are tested and working, enhance the
driver program to continually service customers (up to a maximum of 100 customers per
package type) until there are no more customers. Each customer should be told how much
the cost of sending his/her package was before servicing the next customer. The driver
program should do this using two arrays of pointers; one for each package type. The
program should prompt the user for the specific type of package to send and create the
necessary object. Example:
CISC 2000
Inheritance
Lab Assignment #6
30 points
Professor Papadakis
TwdDayPackages[i] = new TwoDayPackage() OR
OverNightPackages[i] = new OvernightPackage()
5. When there are no more customers a report should be printed summarizing information for
each package sent that day, including sender and recipient information and the cost for
sending that package. At the end of the report, summary information should be displayed
indicating how many of each type of package was sent and the total amount of money each
service generated. Note: This information should be kept as part of the class so give this
one some thought….