[Dev-C++] Newbie question Classes/Objects/Accessors????

[<Rus...@ao...>]

I understand the basics of Classes, but what determines which 
members/functions should be public/private? 
 The Accessor functions (is that the correct terminology?) seem to take a 
public member of a class and attach some argument/value/data to a private member 
of the same class. What is the logic behind this? I can understand what is 
being done, but I don't understand the reasoning.


Regards,
Russ