30: Abstract Data Types in C - Richard Buckland UNSW
Finishes off the ideas started in #29. The need for Abstract Data Types (ADTs). How to implement them in C. Their wonderfulness.
Also: Undocumented features. Can we trust programmers? Allocating memory on the stack. Allocating memory on the heap (malloc/free). Introduction to the project (card game: Blackadder & Baldrick).