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

Safer string operations

Sometimes, it is not possible to ensure that a null-terminated array of characters is provided. This is especially common when strings are read from a file, read from the console, or dynamically created in unusual ways. To prevent mayhem, a few string functions have a built-in limiter that only operates on the first N characters of the string array. These are considered safer operations and are described in the following list:

  • Copy and append strings:
    • strncat(): Concatenates two strings. This appends a copy of up to N characters of one null-terminated string to the end of a target null-terminated string, then adds a terminating `\0'character.The target string must have sufficient space to hold theresult.
    • strncpy(): Copies up to N characters of one string to another. Depending on the size of the destination, the destination string may either be filled with the nul characters or may not be null-terminated.
  • Compare strings...