Book Image

Practical C Programming

By : B. M. Harwani
Book Image

Practical C Programming

By: B. M. Harwani

Overview of this book

Used in everything from microcontrollers to operating systems, C is a popular programming language among developers because of its flexibility and versatility. This book helps you get hands-on with various tasks, covering the fundamental as well as complex C programming concepts that are essential for making real-life applications. You’ll start with recipes for arrays, strings, user-defined functions, and pre-processing directives. Once you’re familiar with the basic features, you’ll gradually move on to learning pointers, file handling, concurrency, networking, and inter-process communication (IPC). The book then illustrates how to carry out searching and arrange data using different sorting techniques, before demonstrating the implementation of data structures such as stacks and queues. Later, you’ll learn interesting programming features such as using graphics for drawing and animation, and the application of general-purpose utilities. Finally, the book will take you through advanced concepts such as low-level programming, embedded software, IoT, and security in coding, as well as techniques for improving code performance. By the end of this book, you'll have a clear understanding of C programming, and have the skills you need to develop robust apps.
Table of Contents (20 chapters)

Using the register keyword in C code for better efficiency

The access time when using registers is quite a bit lower than that of accessing content from any memory variable. So, to take advantage of this, content that is frequently used in any program is kept in registers. The register keyword is used to indicate the content that needs to be kept in these registers.

In this recipe, we will find out the cost of renting a car for a specified distance. The car rent not only depends on the distance but also on the type of car, that is, whether the car has air conditioning (AC) or not. The rent of the AC car per kilometer, the rent of the non-AC car per kilometer, and the service tax percentage values are all stored in register variables.

How to do it...