Programming in C: A Practical Approach, First Edition

5

Functions

Learning Objectives

In this chapter, you will learn about:

• Functions

• Advantages of using functions

• Classification of functions as user-defined functions and library functions

• User-defined functions

• How to declare, define and call functions

• Way of increasing flexibility of functions

• Different ways of supplying inputs to a function

• return statement

• How to provide default inputs to a function

• Recursion and its use to solve problems

• Classification of recursion

• How recursion works

• Tower of Hanoi problem

• Function type and pointers to functions

• Array of function pointers

• Passing arrays and functions to functions

• Commonly used library functions

• Variable argument functions

5.1 Introduction

In the previous chapters, you have seen how ...