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

Using types and assignment

So, we have variables to hold values of a specified type that we can retrieve and manipulate by their identifiers. What can we do with them? Essentially, believe it or not, we can just copy them from one place to another. Values in variables or constants can only be changed through assignment. When we use them, their value is copied as a part of the evaluation but the value remains unchanged. A variable's value can be used in many ways over its lifetime, but that value will not change except when a new value is copied over it. We will now explore the various ways that variables are copied:

  • Explicit assignment using the = operator
  • Function parameter assignment
  • Function return assignment
  • Implicit assignment (this will be covered when we look at expressions in the next chapter)

Let's look at the first three ways of copying the variables in the subsequent sections...