So here I am, just decided to learn C++ .
I've got a few questions:
1. When is it better to use a class and when a structure?
2. What's a double (like when you put int, char, etc.)?
3. With what project should I start...
4. What are binary trees and what uses they have?


If you're wondering my only trainig on C++ are the tutorials in cprogramming.com, until binary trees, wich I didn't understood...

Thanks for helping a newcomer,
Me