work an example of how the stack works, and what needs to be placed on it

automatic vs. static variables, and how they are placed on the stack.
- bad to return ptr to object on stack

how realloc works
malloc library has an allocation table
free/malloc don't touch actual memory or variables allocated/freed

how does BCC work:
- replace mem references with "test functions" (not exactly C functions)
- show example of buf overflow

Cont.: automatic vs. static variables, and how they are placed on the stack.

C functions: call by value
see why you need &foo to pass to function that needs to modify it (say, an int)
- but what if it's a pointer to something? (say an int* array)
rule: for a function to modify "foo" you must pass &foo to fxn.

If you declare a[10]
	what is 'a', &a[0], a+2 (a+2 * sizeof(int))