While searching the database for your required books by author, title or subject.
Ebrary offers an increasing selection of more than 20,000 e-books in business, economics, computers, engineering, and technology.
Free Online Books: Listing more than 35,000 English works in various formats.
While searching database for your required books by author, title or subject, use keywords i.e.Introduction to Programming etc.
These reference resources are available online and are free to download.
http://www.cplusplus.com/doc/tutorial/
http://www.cprogramming.com/tutorial.html
Other supplemental readings will be provided by the instructor.