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

Introducing pointers

A pointer is a variable whose value is the location (or memory address) of some other variable. This concept is so basic yet so essential to understanding pointers that it bears repeating.

A variable identifies a value stored at a fixed location. It consists of a type and an identifier. Implicit in the definition is its location. This location is fixed and cannot be changed. The value is stored at that location. The location is primarily determined by where a variable is declared in a program. The variable identifier, then, is our assigned name for the location of that value; it is a named location to store a value of a given type. We rarely, if ever, care about the specific value of that location—in fact, we never do. So, we never care about the specific address of a variable. We only care about the name of the location or our variable identifier.

A pointer variable, like any other variable, also identifies a value stored at a fixed...