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

Operations on characters

Even though characters are integer values, there are only a few meaningful things we want to do with or to them. The first two things are declaration and assignment. Let's declare some character variables with the following code:

  signed char  aChar;
char c1 , c2, c3 , c4;
unsigned char aByte;

In C, char is the intrinsic data type that is one byte (8 bits). aChar is a variable that holds a signed value between -128 and 127 (inclusive). We explicitly use the signed keyword, even though it is unnecessary. Next, we declare four single-byte variables, each also having the -128 to 127range. Variables are assumed to besignedunless explicitly specified asunsigned. Finally, we declare an unsigned single-byte variable,aByte, which can hold a value between 0 to 128.

We can also assign values at the declaration, as follows:

  signed char aChar = 'A';
char c1 = 65 ;
char c2 = 'a...