Chapter 7. Creating and Using Functions
Learn about various types of functions
Understand function return types and values
Find out how to create your own functions
Discover how to use command-line arguments
Find out how to use variable-argument lists
See how to make functions reusable with modules
Why Use Functions?
Functions are extremely important in C++, and any real C++ program will have at least one custom function designed to perform some of the program’s work. By creating your own functions, you open the door to an endless world of possibilities. In this chapter, you’ll see how to conceptualize and write your own functions. You’ll also see how to pass data to the functions, process this data, and return a useful result to ...