Using autograde (1/27/2015)

You can test your code against the "public" test cases (the ones
included in the assignment) using the autograde program, which can be
run from your Zoo account as described below.  

This will show whether your procedures are giving correct answers 
for the public test cases.  When your assignment is graded, there 
will be additional "private" test cases, so it is important to test 
your procedures *more thoroughly* than just running them on the 
public test cases.

However, be assured that when you run autograde, there is no effect on
the grading of your work -- it is purely to help you test your
procedures.

Usage:
/home/classes/cs201/bin/autograde --test <hwnum> [<probnum>] [<directory>]

NOTE:
- If no probnum is specified, all problems will be tested.
- The autograde assumes the homework rkt file is named hw<probnum>.rkt.
- If the second argument is not a number, the program will assume you
  do not specify the probnum, and take the second argument as a directory.

Examples:
   autograde --test 1 will test all the problems of homework 1 using hw1.rkt 
   in your current directory.

   autograde --test 1 ~/cs201 will test all the problems of homework 1 using
   hw1.rkt in directory ~/cs201

   autograde --test 1 4 will test problem 4 of homework 1 using hw1.rkt 
   in your current directory.

You can redirect the output of the autograde program to a file
named results.txt as follows:

   autograde --test 1 > results.txt

You can look at the file results.txt, or you can grep for wrong answers with:

   grep "WRONG" results.txt

Note that the first test, to return the number of hours you report, is
not "wrong".  You should make sure hours is defined to be a number other
than 0 in order to get 1 point of credit when the assignment is graded.