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

We have just seen how to assign an address to a pointer variable by using another variable's named location, as follows:

int height;
int width;
int length
int* pDimension;

pDimension = &height;

A diagram of the memory layout for these declarations is given in the Accessing pointer targetssection.

We could later reassign pDimension, as follows:

pDimension = &width;

This assigns the address of width to thepDimensionvariable.widthand*pDimensionare now the same memory address. The target ofpDimensionis nowwidth.

Each time we assign an address to pDimension, it is the address of an already-defined variable identifier, as follows:

pDimension = &height;
// Do something.
pDimension = &width;
// Do something else.
pDimension = &length;
// Do something more.

pDimension = &height;

First, we make height the target of pDimension, then width, then length. Finally, we set height...