The C Library Reference Guide
by Eric Huss
This guide provides a useful look at the standard C programming language. In no way does this guide attempt to teach one how to program in C, nor will it attempt to provide the history of C or the various implementations of it. It is merely a handy reference to the standard C library. This guide is not a definitive look at the entire ANSI C standard. It is simply a quick reference to the functions and syntax of the language.
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by Zed A. Shaw - LCodeTHW
A clear and direct introduction to modern C programming. The purpose of this book is to get you strong enough in C that you'll be able to write your own software in it, or modify someone else's code. The text is not for beginners.
by Brian Hall
A brief how-to guide on network programming using Internet sockets, written for anybody who is just starting out with socket programming. The section on Windows programming is also included. The guide is updated for IPv6.
by Steve Oualline - M & T Books
A handy guide which covers the principals of good programming style, teaching C and C++ programmers how to write code that can be easily read, understood, and maintained by others. Useful both for students and professional programmers.
by Mark Burgess, Ron Hale-Evans - Free Software Foundation
This book is a tutorial for the computer programming language C. You should have some basic computer literacy: to be able to run a program, edit a text file, etc. The tutorial introduces basic ideas in a logical order and progresses steadily.