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


In the previous chapter, we created a program where every structure and every function in each source file was available to every other source file. Such accessibility is not always desirable, especially in very large programs with many source files.

In this chapter, we learned about the three components of scope: visibility, extent, and linkage. For variables, we applied those concepts to various levels of scope: block/local, function parameters, file, and global scope. We then learned how these concepts applied to the five storage classes: auto, register, extern, static, and typedef.

We saw how functions have simpler scoping rules than variables. We saw how header files allow functions to be global across multiple files, wherever the header is included. We then applied the static keyword to functions to limit their scope to just a single compilation unit.