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

Passing arrays as function pointers revisited

We can now understand how array names and pointers to arrays are passed in function arguments. If arrays were passed by values in a function parameter, the entire array might then be copied into the function body. This is extremely inefficient, especially for very large arrays. However, the array itself is not passed by a value; the reference to it is copied. That reference is then used within the function to access array elements. This reference is actually a pointer value—an address.

So, the array values themselves are not copied, only the address of the zeroth element. C converts the arraynamed location(without[]) to a pointer value,&array[0], and uses that to accessarrayfrom within the function body.