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

Assigning pointer values (addresses)

As with all other variables, a pointer has no meaningful value until one is assigned to it. Any variable declaration merely states what value the variable is capable of holding. We must assign a meaningful value to the pointer.

A pointer variable holds the address of another named location. This is the target of the pointer. A pointer points to another variable's location. That variable's value is its target. The way to assign an address value to a pointer is to use the & operator and the variable identifier, as follows:

int  height;
int* pDimension;

pDimension = &height;

This assigns the address of the heightnamed location to the pDimensionpointer variable. As we previously mentioned, we don't care about the specific value of&height. But now, we know thatpDimensionpoints to the same memory location asheight. Another way to express this is thatheightis the current target ofpDimension.