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

Considering negative numbers as unsigned integers

We are using the unsigned type conversions. This does not mean that we can't convert a negative number. You may be surprised by the output of the following code:

 printf( " Negative Numbers as Unsigned:\n" );
printf( " -0 [%12o] [%12u] [%12x] [%12X]\n" ,
-0 , -0 , -0 , -0 );
printf( " -1 [%12o] [%12u] [%12x] [%12X]\n" ,
-1 , -1 , -1 , -1 );
printf( " -2 [%12o] [%12u] [%12x] [%12X]\n" ,
-2 , -2 , -2 , -2 );
printf( " -12 [%12o] [%12u] [%12x] [%12X]\n\n" ,
negativeInt , negativeInt , negativeInt , negativeInt );

Negative numbers are treated specially by every computer system; they are converted internally using an algorithm called two's complement. Two's complement is a method to avoid the problem of having +0 and -0, which is why the second statement in this code snippet uses -0 as a value to test how it is treated....