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)

Dividing two numbers using assembly code in C

In this recipe, we will learn to divide two numbers using the inline assembly language in C. The assembly language provides us with better control over CPU registers, so we have to manually place the divisor and dividend in their respective registers. Additionally, after the division, the quotient and remainder will be automatically saved in their respective registers.

How to do it…

To divide two numbers using assembly code in C, perform the following steps:

  1. Load the dividend into the eax register.
  2. Load the divisor into the ebx register.
  3. Initialize the edx register to zero.
  4. Execute the divl assembly statement to divide the content of the eax register by the...