C Primer Plus®, Third Edition

Chapter 9. Functions

You will learn about the following in this chapter:

• Keyword

  return
  

• Operators

  * (unary) & (unary)
  

In this chapter, you learn about functions: how to define them, how to use arguments and return values, and how to use pointer variables as function arguments. You find out about function types, ANSI C prototypes, and recursion.

How do you organize a program? C's design philosophy is to use functions as building blocks. You've already relied on the standard C library for functions such as printf(), scanf(), getchar(), putchar(), and strlen(). Now you're ready for a more active role: creating your own functions. You've previewed several aspects of that process in earlier chapters, and this chapter consolidates your earlier information ...