Explain the distinctions among private, protected, and public base classes in C++. Describe the notion of selective availability in Eiffel. How do the rules for member name visibility in Smalltalk and...

Explain the distinctions among private, protected, and public base classes in C++. Describe the notion of selective availability in Eiffel. How do the rules for member name visibility in Smalltalk and Objective-C differ from the rules of most other object-oriented languages? How do inner classes in Java differ from most other nested classes?