When we build a house why do we make rooms? In our daily life why do we use so many different people who specialize in different professions, such as physicians, lawyers, accountants, etc? Same reasoning can be applied to programming. When we write a good program, it must be divided into modules; each module is designed to do a particular task. In C++ there are two types of modules, functions and classes. In this chapter we will deal with functions. You can write functions that can be used over and over again in a program or in several programs. In.
