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

Command-line switches and command-line processors

The showArgs.cprogramis an extremely simple command-line argument processor. It merely prints out each command-line argument but otherwise does nothing with any of them. In later chapters, we will see some ways that we might use these arguments.

We have been using command-line switches whenever we compiled our programs. Consider the following command:

          cc showArgs.c -o showArgs -Wall -Werror -std=c11

We have given the ccprogram the following arguments:

  • The name of the input file to compile, which is showArgs.c.
  • A output file specifier, which is -o.
  • The name of the output file, which is showArgs. This represents an argument pair where the specifier and additional information is given in the very next argument. Notice how the specifier is preceded by a hyphen (-).
  • The option to provide warnings for all possible types of warnings with -Wall...