Chapter Objectives

Upon completion of this chapter the student will understand and be able to utilize the following key concepts:

Polymorphism is a language mechanism that permits the same code expression to invoke different functions depending upon the type of objects using the code.

We explore some C++ methods for achieving polymorphism.

A template, when invoked with particular types and values, can generate a new function or class.

Another method of achieving polymorphism is through virtual member functions. This method is sometimes called pure polymorphism.

In an expression involving a virtual function invocation, the decision on which function to use is delayed until run time.

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