Here are links to where you can learn more... all free, on the web:
Programmers Heaven - Where programmers go!
The GNU C Library - Table of Contents
C Functions - Quick Reference
#C++ Website

You can read "Thinking in C++" at codeguru, or at the author's website.  This is a very thorough treatment of the language, but it's hard to read sometimes.


Not-so-free, and not on the web: 

The best C++ tutorial I've used is called "Beginning Visual C++", which teaches you the language and then teaches you how to use Microsoft's Visual C++ compiler to create Windows programs.  It's over 1000 pages, so it's expensive (about $50), but it's so easy to read and follow, and the author provides plenty of examples and explanations.  You can find it at the publisher's website,, or