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)

Deleting data from the database using C

In this recipe, we will learn how to delete information from a database table. We assume that a users table comprising three columns, email_address, password, and address_of_delivery, already exists (please see the beginning of this chapter, where we created an ecommerce database and a users table in it). You will be prompted to enter the email address of the user whose row has to be deleted. On entering an email address, all the information of the user will be displayed. Thereafter, you will again be asked to confirm if the displayed row should be deleted or not. After your confirmation, the row will be permanently deleted from the table.

How to do it…

  1. Initialize a MYSQL object...