Book Image

Learn C Programming

By : Jeff Szuhay
Book Image

Learn C Programming

By: Jeff Szuhay

Overview of this book

C is a powerful general-purpose programming language that is excellent for beginners to learn. This book will introduce you to computer programming and software development using C. If you're an experienced developer, this book will help you to become familiar with the C programming language. This C programming book takes you through basic programming concepts and shows you how to implement them in C. Throughout the book, you'll create and run programs that make use of one or more C concepts, such as program structure with functions, data types, and conditional statements. You'll also see how to use looping and iteration, arrays, pointers, and strings. As you make progress, you'll cover code documentation, testing and validation methods, basic input/output, and how to write complete programs in C. By the end of the book, you'll have developed basic programming skills in C, that you can apply to other programming languages and will develop a solid foundation for you to advance as a programmer.
Table of Contents (33 chapters)
Section 1: C Fundamentals
Section 2: Complex Data Types
Section 3: Memory Manipulation
Section 4: Input and Output
Section 5: Building Blocks for Larger Programs

A brief tour of C's memory layout

It is now time to gain a cursory understanding of how C organizes memory when a program is loaded and run. This discussion builds upon the Introduction to pointers section in Chapter 13, Using Pointers. Consider the following diagram:

This is a very simple conceptual view of a program's memory space. The operating system provides this space to the program when it is loaded to be run. The C runtime then divvies up the memory given to it into segments, each for a specific use. It consists of the following segments:

  • System memory: This consists of system memory and system programs, as well as the addresses for all of the devices on the computer. This segment is mapped for all running programs so that there is only ever one copy of the system code in the overall system memory space. The system exclusively manages this memory.
  • Program code: This is where the compiled program...