Hey there, I was just wondering whether anyone knew of any good yet easy tutorials or examples of the best way to divide your code up into classes and have them interact. I am rather certain that having everything in a “world” class will come to be a limitation soon enough, but I’ve tried dividing my code up into different classes and things continually go wrong. I’ve found a few full games with such, but they tend to be divided into dozens of files and scores, if not hundreds, of classes; something with just 3-4 classes and as few files as possible might be night. If anyone knows any good examples of how to use classes, that’d be great! 
May this tutorial helps you
http://www.4shared.com/file/sGX_DNBY/example.html
open the cube file and run it