In class 10, we begin an examination of the stack ADT, looking at both the linked list
and array implementations. The lecture notes for class 10 are available in HTML format and in the postscript document Lists starting on page 13.

Sample code showing the Array implementation of the Stack, and using the stack
are also available in HTML format.
See Stack.h for the declaration, and Stack.C for the implementation.
The file testStack.C shows how to use the stack to push data, pop data and
to print the contents of the stack. testStack.C also relies on Complex.h
to define and implement Complex data elements on the stack.

As an execise, you may wish to implement the Stack copy constructor and/or assignment
operator, which are defined in Stack.h, but not implemented in Stack.C