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)

Taking input faster in C

In this recipe, we will learn to take input faster from the user. We will ask the user to enter a number and the entered number will be displayed on the screen. We will make use of the getchar_unlocked() function for this purpose.

The getchar_unlocked() function works similarly to getchar() function, with the difference that it is not thread-safe. As a result, it overlooks certain input constraints and so is quite a bit faster than getchar(). It is used for taking long input data in a situation where a single thread is being used for handling input and other streams.

How to do it…

The steps for taking a number from the user using a faster input approach are as follows:

  1. The...