Book Image

Learn C Programming

By : Jeff Szuhay
Book Image

Learn C Programming

By: Jeff Szuhay

Overview of this book

C is a powerful general-purpose programming language that is excellent for beginners to learn. This book will introduce you to computer programming and software development using C. If you're an experienced developer, this book will help you to become familiar with the C programming language. This C programming book takes you through basic programming concepts and shows you how to implement them in C. Throughout the book, you'll create and run programs that make use of one or more C concepts, such as program structure with functions, data types, and conditional statements. You'll also see how to use looping and iteration, arrays, pointers, and strings. As you make progress, you'll cover code documentation, testing and validation methods, basic input/output, and how to write complete programs in C. By the end of the book, you'll have developed basic programming skills in C, that you can apply to other programming languages and will develop a solid foundation for you to advance as a programmer.
Table of Contents (33 chapters)
Section 1: C Fundamentals
Section 2: Complex Data Types
Section 3: Memory Manipulation
Section 4: Input and Output
Section 5: Building Blocks for Larger Programs

Simplifying the use of enum types with typedef

Before we examine the use of typedef with enums, we must first complete the picture of using enums. Remember that defining a new type does not require memory allocation. Only when we declare variables of a given type is memory allocated to the variables. In the last two chapters, we used enums by first defining them and then separately declaring variables of that type, asfollows:

  // First define some enumerated types.

enum Face { one , two , three , ... };
enum Suit { spade , heart, ... };

// Then declare variables of those types.

enum Face f1 , f2;
enum Suit s1 , s2;

In the preceding code fragment, we have defined two types—enum Face and enum Suit. Later, in separate statements, two variables of each type are declared—f1, f2, s1, and s2.

Another way to achieve the same result is to both define the enumerated type and to declare variables of that type in one statement, as follows: