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)

Drawing a circle

The procedure for drawing a circle is completely different from the other graphical shapes, hence it gets its own dedicated recipe. It needs a for loop to draw small points or lines at 0 to 360 degrees. So, let's learn to draw a circle.

How to do it...

The following are the steps for drawing a circle:

  1. Initialize GLUT, define the size of a top-level window, and create it. Also, set the initial position of the window for displaying our circle.
  2. Define a callback function that is auto-invoked after creating the window.
  3. In the callback function, color buffers are cleared and the color for displaying the circle is set.
  4. The statements for drawing a circle are grouped within a pair of glBegin and glEnd functions...