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

Empty strings versus null strings

When a string contains no printable characters, it is called an empty string. The following declarations are empty strings:

char* emptyString1[1] = { '\0' };
char* emptyString2[100] = { 0 };
char* emptyString3[8] = { '\0' , 'h' , 'e' , 'l' , 'l' , 'o' , '\0' } ;

The first empty string is a character array of a single element—the nul character, or '\0'. The second empty string is a character array of 100 elements, all of which are '\0', the nul characters. The third empty string is also an empty string; even though it has printable characters, the nul character ('\0') in the zeroth element signifies the end of the string, thereby making it empty. After the first nul character, '\0', is encountered, it doesn't matter what comes after it; it is still seen as an empty string.

When an array reference...