Lecture 33

Examples of the IntCell class where the instance variable is now a pointer
to an integer.

• intcell_default.h
• intcell_bigthree.h
• intcell_tester.cpp

In intcell_default.h the big three (destructor, copy constructor and operator=) functions
are not defined -- the defaults are used instead

In intcell_bigthree.h, we define the destructor, copy constructor and operator= functions

In intcell_tester.cpp we create different IntCell variables using the copy constructor and
the operator= function. Change which .h file is included to change which version of IntCell is used