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 a filename

A filename identifies a unique file within a directory. Each filename is typically unique within a directory. We think of this directory as the location where the file exists. A directory name is part of the file path.

A filename can take many forms, depending on the filesystem. In Windows, Unix, and Linux filesystems, a filename consists of one or more alphabetic characters with an optional extension. A file extension consists of one or more characters with a separating dot (.) between it and the name. The combination of the name and extension must be unique within a directory. We have already seen this with our source files that have a .c extension, our header files that have a .h extension, and our executable files, which, by convention, have no extension.

With these concepts in mind, we are now ready to begin manipulating files in C.