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

Defined values

Another way to define constants is to use the #definepreprocessor directive. This takes the form of #define symbol text, where symbol is an identifier and text is a literal constant or a previously defined symbol. Symbol names are typically all in uppercase and underscores are used to distinguish them from variable names.

An example would be to define the number of inches in feet or the number of feet in a yard:

#define INCHES_PER_FOOT 12
#define FEET_PER_YARD 3

feet = inches / INCHES_PER_FOOT;
yards = feet / FEET_PER_YARD;

When the preprocessing phase of compilation encounters a definition such as this, it carries out a textural substitution. There is no type associated with the symbol and there is no way to verify that the actual use of a symbol matches its intended use. For this reason, the use of these kinds of constants is discouraged. We only included them here for completeness since many older C programs may make extensive use of...