@interface MIMClass : NSObject
int _privateVar; //BY convention I usually put _ in front of private variables.
int _myVar; //By default, every variable you define is in protected mode so if you don't write protected above your variables, they are by default in protected mode.
int publicVar; // Can be accessed by any object,view
I guess the code above pretty much explains how you can declare the private and public members in Objective-C