Essential things to remember from today's class (class 21, 2nd November)

Make sure you understand both of the partitioning algorithms we looked at
and the overall quicksort algorithm. Be sure you could recreate them all
for yourself.

Be sure you understand about class inheritance, making subclasses and so on.

Understand the need for virtual methods and what they are all about.

Be sure you could recreate our little examples for yourself, if given a
clear description of what they are supposed to do. There is no point
in memorising that.