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

Understanding the standard input stream

The standard input stream is a pointer to a complex FILE structure named stdin. This stream reads any characters typed from the keyboard to be formatted by the scanf() function.

Like the output stream, by default, the input stream is also buffered. For input, this means that characters are sent to the buffer. The buffer is not flushed until either the buffer is full or until CR is encountered in the input stream. As we enter characters, program control is maintained by the console and is not returned to our program until the buffer is flushed. The processing of the input characters then appears to our program as if they were received one at a time.

In reality, however, it is a bit more complicated than this. The console has two modes of processing—cooked mode and raw mode.

Cooked mode uses buffered input and is the default mode unless it is explicitly changed. It also means that we can alter our input in the...