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 synonyms

Up to this point, we have relied on the variable's name as the sole provider of the purpose, which is our intended use of that variable. The name tells us (humans) what we expect that variable to contain. The computer doesn't really care since a variable is just a location in memory somewhere that holds some value of the given type.

For instance, we might have three variables to hold measurement values—height, width, and length. We could simply declare them as integers, as follows:

int height, width, length;

Their use as measurements is fairly obvious, but what are the intended units of measurement? We cannot tell this from the int type. However, by using typedef, we can add more useful context, as follows:

typedef int meters;

meters height, width, length;

height = 4;
width = height * 2;
length = 100;

meters has been defined as a synonym of the int type. Anywhere we use these, either as standalone variables or...