Program 5	Dordal		Due: April 30, 2001

You are to modify the game program presented in class, adding the
following features:

1. There is a damControlRoom with a large valve in it, from which
steps lead down to a room below ("wetroom"). You are to arrange things
so that the room below is described as "submerged", and you can't go there,
until the player executes TURN VALVE in the damControlRoom.

After you return to the damControlRoom, the wetroom should automatically
"reflood", so you have to TURN VALVE again to go down there again.
Note, however, that all the state regarding this puzzle is in 
damControlRoom; wetroom is just an ordinary room with no special state.


2. You are to add default interpretations to TURN, EAT, and every other
verb so that, if you try to TURN ANYTHING anywhere but the damControlRoom,
the game responds
	There is nothing to turn here
and similarly for EAT
	You can't eat here 
(or, if you prefer, "you're not hungry yet"). That is, *every* verb should
be recognized as a legitimate game term in *every* room, not just in the
rooms where the verb is "applicable". This is important for the player,
in order to give some hint as to what the relevant verbs *are*.

To do this, you need to modify default_interpret.


3. If you eat the chocolate, it should go away.

Optional: the chocolate should last 2-3 bites. Keep the number of bites left
as an attribute of the chocolate itself. 


4. You are to add one additional puzzle of your own. Your puzzle should,
at a minimum, involve the following:
	one new CarryObj 
	one new verb 
	one new derived room class, with special behavior for 
		at least one verb (new or existing).
	some kind of state change to the room or to an object
	 	(like the stone being moved or valve being turned)

Your puzzle should also have appropriate clues in the game, and make 
sense as a puzzle as well as a program.

Here are a few possibilities.

UNLOCK CHEST with a KEY found elsewhere; once the chest is unlocked,
something should be inside.

FIGHT DRAGON with SWORD; while the dragon is alive flight is blocked.

Cross a rickety two-move bridge over a bottomless pit; if you carry too
much the bridge will break; if you try to DROP things once on the middle
of the bridge to avoid this, they are lost forever.

Have goblins attack you in a pitch-black cave room, if you fail to
LIGHT LANTERN within 2 turns. Note that this puzzle involves keeping
count of turns.