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Alright, I finally decided on a topic for my IB Essay, my title is:

Objective-C vs. C++: An Analysis of single and multiple inheritance.

Basically I will write a program in two ways, one using single (and objective-c) and the other using multiple (and C++).  Hopefully I can demonstrate that multiple is easier, makes more sense design-wise, and and is more reusable.

I was wodnering if any of you know of any good books or websites that discuss the evolution of of inheritance and that sort of thing (for example I know C++ didn't have multiple inheritance initially but then was added, but I need somewhere that explicitly states this so I can cite it).  Also, what would be great is places that say "Multiple inheritance was left out of objetive-c because...".  That would be perfect.  Any help is greatly appreciated, I know this stuff it kinda hard to find since most places are all "If you want to program this then", and this is more history and design.