Learning GNU C
by Ciaran O'Riordan
The aim of this book is to teach GNU users how to write software in C. It is written primarily as a tutorial for beginners but should be thorough enough to be used as a reference by experience programmers. The basics are layed down in full in the first few chapters.
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by J. H. M. Dassen, I. G. Sprinkhuizen-Kuyper - OOPWeb.com
This document describes several techniques and tools for debugging code in C-like languages in a Unix environment. We will also discuss some good coding practices that will diminish the occurrence of certain types of bugs.
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 Simon Long - Raspberry Pi Ltd.
Learn to code with C across 13 packed chapters: Create variables and do arithmetic; Control the flow of your C programs; For loops and case statements; Understand and create functions; Work with arrays and strings; and much more.
by David Haskins - BookBoon
Using a series of web development examples, this book will give you an interesting glimpse into a powerful lower-level world. C is tight and spare and economical, and people who know C will ensure critical systems keep running.