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)

Searching for the desired information in the database

In this recipe, we will learn how to search for information in a database table. Again, we assume that a users table comprising three columns, email_address, password, and address_of_delivery, already exists (please see the section, Creating a MySQL database and tables, of this chapter, where we created an ecommerce database and a users table in it). On entering an email address, the recipe will search the entire users database table for it, and if any row is found that matches the supplied email address, that user's password and address of delivery will be displayed on the screen.

How to do it…

  1. Initialize a MYSQL object:
  1. Establish a connection...