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

Putting visibility, extent, and linkage all together

We now have an idea of the components involved in a scope. Within a single file, the visibility and extent components are somewhat intertwined and take primary consideration. With multiple files, the linkage component of a scope requires more consideration.

We can think of scope starting from a very narrow range and expanding to the entire program. Block and function scope has the narrowest range. External variables and function prototypes have a wider scope, encompassing an entire file. The broadest scope occurs with the declarations from within a single file and expanded across multiple files.

Some clarification is needed regarding global scope. Global scope means that a function or variable is accessible in two or more source files. It is very often confused with file scope, where a function or variable is only accessible in the single file where it is declared. So, when a programmer refers to a global variable...