The File Checker

Your mission is to write a pair of programs. The first program compares two files, the second program is a spell-checker.

These programs are due Wed Jan 30th and lose 10% for every day thereafter.
These programs must have your name and expected grade at the top, or that's -5 points.
Finally, it's -5 points for every subroutine including main that's more than 20 lines long.
You get +5 points if either assignment uses the command line. Look up "ARGV" and find out how yourself.

File Comparer

Points	Task
5	Can tell if two files are identical
5	Can tell which lines differ between the two files. The "sort and compare" trick might help here.
5	Uses an algorithm better than O(n^2) to find lines that differ

Note that if two files are identical except for one inserted line in the middle, then they differ by ONE line and not by every line after the insertion.

Spell Checker

Points	Task
5	Can tell which words are misspelled
5	Uses an algorithm better than O(n^2). Associative arrays might help here
5	Also checks against a "naught word" list.
-5	It's case sensitive

This is out of 35 points.