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

Understanding array names and pointers

As we have seen, elements of arrays can always be accessed via indices and traversed by means of an integer offset from the zeroth element. Sometimes, however, it is more convenient to access array elements via a pointer equivalent.

Let's begin by declaring an array and two pointers, as follows:

const int arraySize = 5;
int array[5] = { 1 , 2 , 3 , 4 , 5 };
int* pArray1 = NULL;
int* pArray2 = NULL;

We have declared a contiguous block of arraySize, or 5, which are elements that are integers. We don't use arraySize in the array declaration because the array cannot be initialized as array in this way, even thougharraySize is a constant. We have also declared two pointers to integers—pArray1 and pArray2. In the memory on my system, this looks something like the following:

Remember that we can't control the ordering or location of variables, but we...