Winter 18-19
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* Didn't have time for realloc example with pig latin.  Would be nice to demo realloc.
* Spent too long on initial "misc. useful topics".  Maybe fold into earlier lectures?
* create_string example _could_ in theory use stack allocation and get away with it, because the caller knows the length.  Try to come up with better example (e.g. pig latin, but simpler to trace) where the caller cannot know what the size is in advance.
* show more examples of trying to free individual parts of heap memory (e.g. index i in a heap array), array of structs on heap, etc.?
* didn't have time to include slide on when to use stack vs. heap, and that stack is preferred.  Had to bump to start of next lecture.


Spring 18-19
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Notes from above, plus...
* able to squeeze in stack vs. heap slides this time
* initial misc. usefull topics take about 15 minutes.  Would be nice to fold into earlier lectures
* couldn't demo realloc in time
* pig latin is very string-heavy, seems to focus more on strings than memory

Fall 19-20
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* Example of structs, specifically declaring outside of any function.
* same as above about pig-latin; very string heavy, couldn't demo realloc, had to cut short demo 1
* maybe introduce structs in lab instead?
* more examples of freeing memory

Fall 20-21
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* Further emphasize that when we free a pointer, we are freeing what it points to, not the pointer itself