CSC161 2010F, Class 38: Discussion of Exam 2

Overview:
* General Issues.
* Problem 1.
* Problem 2.
* Problem 3.
* Problem 4.
* Problem 5.
* Analyzing Quicksort

Admin:
* Exam 2 returned.
* Reading for Tuesday: K&R 5.10-5.11.

Assignment 7:

* Look at my solution to exam problem 3.  It demonstrates some of the
  key ideas.