CISC 124 Assignment 2
                      Due February 13, 2004

You are to build the Snake Game, in which the player controls a snake
that moves around the screen.  Your goal is to move the snake to eat
food.  Each time the snake eats food, it gets longer.  The games ends
when the snake eats itself.  The problem is that the snake never stops
moving, and it gets hard to prevent it from running into (i.e. eating)
itself.

Skeleton code have been provided at 

   http://www.cs.queensu.ca/~jstewart/124/a2.zip 

Read and understand the internals of all of the code, except for the
internals of the Console class.

You are to modify that code to implement the following features:

1. Get the Snake.feed( int amountOfFood ) method working.  After that
   method is called, the snake should grow by the amountOfFood provided.
   The growth should happen gradually: The head of the snake keeps
   moving, but the tail remains stuck until the length of the snake has
   increased by the right amount.  THINK about this before implementing
   it.

2. Get the Snake.squaredDistToSnake( int x, int y ) working.  Given a
   location (x,y), this method returns the square of the distance from
   (x,y) to the closest link of the snake.  You'll have to use an
   iterator to look through all the links.  This is very similar to the
   hasHitSelf() method.

3. Feed the snake when it passes over some food.  Place your code at
   "YOUR CODE HERE" in the main() procedure.  When the snake passes over
   some food, you should (a) feed the snake, (b) update the snake length
   shown in the upper-left corner of the screen, (c) place a random
   amount (between 3 and 8 units) of new food at a random location on the
   screen, but not within two spaces of the snake's body, and (d) draw
   the new food.  In placing the food randomly, you might have to make
   several attempts, rejecting those attempts that are too close to
   the snake's body.

If you want (and for no extra credit) you could improve the game.  For
example, the snake could gradually speed up as the game progresses.
Or you can have *two* snakes with *two* players simultaneously.  Or
obstacles that the snake can't pass through (but can hit without
penalty).  Or a computer-guided snake (challenging).