C Programming by wikibooks.org
This note explains the following topics: Compiling, Structure and style, Variables, Error handling, Simple Input and Output, Simple math, Procedures and functions, Preprocessor, Libraries, File IO, Arrays, Pointers, Memory management, Strings, Complex types, Networking in UNIX, Particularities of C, Language Overloading and Extensions, Combining Languages, Computer Programming, C Reference Tables, POSIX Reference, Licenses.
Author(s): Wikibooks.org
NA Pages 
Programming in C by Guru Jambheshwar University
This note covers the following topics: C essentials, Data types, Data input and output, Operators and expressions, Decision control structure, Loop control statement, Arrays, Functions, Strings, Pointers and Introduction to cpp.
Author(s): Guru Jambheshwar University
278 Pages
The C programming Language by Steve Summit
C is a relatively small language, but one which wears well. Topics covered includes: Basic Data Types and Operators, Statements and Control Flow, Functions and Program Structure, Basic I/O, Operators, Strings.
Author(s): Steve Summit
122 Pages
This web site contains course notes for an introductory C Programming course, that does not include any features of C++.
Author(s): Dr. John T. Bell
NA Pages
Programming in C UNIX System Calls and Subroutines Using C (by A. D. Marshall)
This note covers the following topics: The Common Desktop Environment, C/C++ Program Compilation, C Basics, Conditionals, Looping and Iteration, Arrays and Strings, Functions, Pointers, Dynamic Memory Allocation and Dynamic Structures, Low Level Operators and Bit Fields, The C Preprocessor, C, UNIX and Standard Libraries, Integer Functions, Random Number, String Conversion, Searching and Sorting, String Handling, File Access and Directory System Calls, Interprocess Communication (IPC), PipesRemote Procedure Calls (RPC) and Writing Larger Programs.
Author(s): Dave Marshall
NA Pages
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C Programming Notes (Steve Summit)
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Learning GNU C (C. O'Riordan) Mirror
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The GNU C Programming Tutorial (M. Burgess)
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The GNU C Programming Tutorial (M. Burgess) Download
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