I'm looking for any guides/tutorials on building a simple system/application using OO methods.
I'm new to OOP and after reading lots of 'What is OOP?' examples, I get the jist of what a class, method and property is and I get how to call them, creating an instance and manipulating that.
What I don't get is how sever classes can work together to form a functioning system. I've done a fair amount of Googling on the subject, but I can't seem to find a tutorial on building a simple system (for example a simple inventory system to manage DVD's or something) to show how they work in a real world situation (including database creation).
If anyone knows any websites that do such a thing, or can offer advice, or even point me in the direction of a book that might do such a thing then could you please share this information as I am actually tearing my hair out.
Many thanks.