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)

Applying stringize and token-pasting operators

The stringize or hash symbol (#) can be used in a macro definition to convert the macro parameter into a string constant. You can imagine that the parameter is enclosed in double quotes and returned. It is also known as a token-concatenation operator.

The token-pasting operator (##) combines two parameters when used in a macro definition. That is, the two parameters on either side of each ## operator are joined into a single string. More precisely, it performs string concatenation on the two parameters to form a new string.

In this recipe, we will learn how to apply stringize and token-pasting operators in computing. The user is asked to specify a certain pizza size and their desired toppings and, accordingly, the price of the pizza is displayed.