Harbison & Steele, "A C Reference Manual"
I'm never far from my copies of K&R (previously mentioned in this thread) and Harbison & Steele's "A C Reference Manual"
It won't teach you HOW to program C, but it has all the information in one place, neatly accessible, and easy to read.
If you're just beginning, it may not seem helpful at first, but as you progress, I think you'll find it very nice to have.
Comeau's Suggestions for C++, OO, and C Literature
http://www.comeaucomputing.com/booklist/
I like Prata's C Primer Plus 5/ed. Pretty comprehensive.
Best books on C and Data Structures
These two are best book on C and Data Structures
1. C In Depth 2nd edition
BPB Publication
Deepali Srivastava
This is best book I have ever seen. Each chapter of this book is unique and ultimate.
Each chapters like control statement, functions, array, pointer, structure, file handling, Bit manipulation, preprocessors and others are so simple as well as given in detail and also how it has been used while doing system software development.
I have never seen Pointers and File handling in this wonderful way. As well as got how to develop one project in C and code optimization in this book in very easy way.
I really got good knowledge and confidence after studing this book.
And I am really agree with autor words who claim that this book make students from learner to developer.
2. Data Structures Through C In Depth
BPB Publication
Deepali Srivastava
This book has most of the data structures explained in very easy way as well as implementation is also given in way that anyone can understand easily.
I went trough 4-5 books but was able to understand the data structures from this only as most of the books have not given implementation.
Unfortunately author has written the book only on these two topics and I have seen lot of people asking her to write on other topic as well.
As I was also searching book C++ In Depth by her but came to know that it has not been written and have requested her in mail that we need on this as well. :p
C++:The Complete Reference
C++ , The Complete Reference by Herb Schildt.
Pros: A huge (1k page) reference to the entire language + the standard libraries. Although it is a "reference", it makes a good learning tool as well while being significantly more analytical and thorough than most other programming books. Devotes a quarter of the book to the standard C subset of C++, which is great for anyone who is only concerned with c.
Cons : Writing style is extremely information dense and may be too dry for some readers. There are no exercises or problems for the reader (it is a "reference", after all). Additionally, the book assumes some prior programming experience on the part of the reader and is not a good read to learn what loops or variables (or other basic concepts) are.