CSC302 2007S, Class 12: More C Stuff, Including a Bit on Make

Admin:
* Assigned: HW5.
* Due: HW4.
* The readings for Monday are the same as the readings 
  for last Monday 
  * McCarthy's History of Lisp 
  * Two things by Paul Graham
  If you commented already, you might rescan them.
* Don't forget lunch with Atul Gupta today JR25C PDR 224C.
* I'm not thrilled at the number of you who submitted HW 
  after midnight.
  * And I know that you're not thrilled that I provided you
    with non-working code.

Overview:
* Quicksort, continued.
* Representing points.

/Before the end of class on Wednesday .../

* Testing
* Typedefs
* Macros
* How C programmers think

* Project: genericize Quicksort
* End of class problem:
  * How do you define a comparator type?
    typedef int (*comparator)(BASETYPE x, BASETYPE y);
  * How do you use a comparator once you've defined that type?:
    (*comp)(foo,bar) >= 0
  * How do you define a comparator once you have the type?
    int ilt(int x, int y)
    {
      ...
    }

Refactoring problem:
* Whoops!  I need to sort integers and strings at different
   points in my program.