You've taken a program from a few short lines to a fully object-oriented collection of several classes in many files.
If you are a professional programmer, you should now realize how well C++ supports every aspect of program development.
And if you've never programmed before, you've had the opportunity to go through several complete development and maintenance cycles, experiencing all the activities that are part of the life of the professional programmer.
You can envision a program as a list of instructions, a set of functions, or a set of classes and objects. Of these viewpoints, seeing a program as classes and objects offers the greatest opportunity to structure programs in a way that ...