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)

File Handling

Data storage is a mandatory feature in all applications. When we enter any data while running a program, that data is stored as RAM, which means that it is temporary in nature. We will not get that data back when running the program the next time. But what if we want the data to stay there so we can refer to it again when we need it? In this case, we have to store the data.

Basically, we want our data to be stored and to be accessible and available for reuse whenever required. In C, data storage can be done through traditional file handling techniques and through the database system. The following are the two types of file handling available in C:

  • Sequential file handling: Data is written in a simple text format and can be read and written sequentially. To read the nth line, we have to first read n-1 lines.
  • Random file handling: Data is written as bytes and can...