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 compilation units

A compilation unit is essentially a single source file and its header file. That source file may be a complete program or it may be just one among several or many source files that make up a final executable. Each source file is preprocessed and compiled individually in the compilation phase. The result of this is an intermediate object file. An object file knows about external functions and variables via header declarations but defers the resolution of their actual addresses until later.

When all source files have been successfully compiled into object files, the link phase is entered. In the link phase, the addresses of functions in other files or libraries are resolved and the addresses of external global variables are resolved. When all unresolved addresses have been successfully resolved (linked together), the object files are then combined into a single executable.

In the dealer.c program, there were four source files. Each...