CSE 110 - Homework 6

CSE110 Spring 2001

Homework #6

Due Friday, March 30th at 5pm

Note: bold text in the examples is input from the user.

[25 points] Good work -- Ringo Starr was so appalled by your simulator that he's given up writing octopus songs for good. He even broke up his band! Now the international oil cartel OPEC wants to use your simulator to test the maximum amount of refinery byproducts that can be dumped in the ocean before the animals that live there become enraged. Since OPEC plans to use Ringo Starr to do all of its hazmat dumping, the changes to your simulator will be relatively minor.
Ringo should start in the octopus' garden just as before, but he must now make his way to a submarine refinery immediately south of the eels, collect/grab at least three drums of spent catalysts and resins (a big refinery like that should have about a dozen of them), and then deposit/throw them in the crab's place, carrying no more than one at a time. When Ringo deposits the third drum, the crab should become seething mad, and OPEC should get its answer.
Without a good mechanism for recording the locations of objects, this application will hopelessly complicate your simulator. You should therefore implement functions for the grab and throw commands, each of which should take an array of 100 enumerated Location types as a parameter (representing the locations of all the objects in the simulation), and update this array with whatever changes Ringo's actions effect. The functions should conform to the following prototypes:
```
void Grab ( Location locations[100] ) ; 
void Throw ( Location locations[100] ) ;
```
and should be called from the switch/case statement in the main function of the program. Note that, since Ringo must still negotiate the octopus at the beginning of the simulation (by grabbing and throwing it, among other things), the code that controls this intercourse must be adapted to work within the function implementation described above. Hint: this can be done by adding Locations for Ringo's hand and the floor of the garden.
Example:
```
% a.out
You're in the octopus' garden again.
Your action: g
You grab the octopus with your mighty European arms.
Your action: t
You throw the octopus onto the ground.  It is momentarily dazed.
Your action: e
You swim east, out of the octopus' garden.
This area is packed full of electric eels.
Your action: s
You swim south.
There is a submarine refinery here, with plenty of liquid waste.
Your action: g
You grab a drum of liquid waste.
Your action: n
You swim north.
This place is packed with eels.
Your action: n
You swim north.
There is a crab here.
Your action: t
You throw a drum of liquid waste onto the ground.
Your action: s
You swim south.
This area is packed full of electric eels.
Your action: s
You swim south.
...
There is a crab here.
Your action: t
You throw a drum of liquid waste onto the ground.
Three drums of liquid waste -- the crab becomes furious and 
OPEC pulls you out.  Well done.
```

[30 points] Poor Ringo. After all his help, OPEC wants to simulate what would happen if they just leave him in the ocean, even though he doesn't like it there anymore. That means you'll have to add a bunch of new areas for him to wander through, and keep track of which areas are to the east, west, north, and south of which other areas.

Use a two-dimensional five-by-five array of enumerated Location types to represent the extended seascape, and pass this array as an additional parameter to your Move function. The Move function should then find Ringo's current Location in this array and return the Location in the immediately adjacent array cell, in the appropriate direction. Test the program on the map below:

   watery     undersea   Davy Jones    spooky   Micky Dolens
   grave        tomb       locker     sinkhole     locker


  sand bar     prawn      brine &      crabs      yellow
   & grill      shop      spirits     cottage    submarine


   coral       pointy     octopus       eels      mess of
    reef       rocks       garden     estates      smelts


  bunch of    sunken       stolen      marine     barnacle
   shells   pirate ship   puppets     refinery      pile


   manatee      sea         sea          sea      visitors
    party      horses     cowboys      monkeys     center

Example:

% a.out
You're in the octopus garden.
Your action: g
You grab the octopus with your mighty European arms.
Your action: t
You throw the octopus onto the ground.  It is momentarily dazed.
Your action: e
You swim east, out of the octopus garden, into the eels estates.
Your action: e
You swim east, out of the eels estates, into the mess of smelts.
Your action: s
You swim south, out of the mess of smelts, into the barnacle pile.
Your action: q
You quit, bored of undersea life already.

[30 points] Ringo doesn't want to get lost, so your simulator should give him the ability to view (using keyboard command `v') a character-based map that looks the one below. This feature should be implemented as a function View, that takes the five-by-five Location map, and an array of strings as parameters:
```
void View ( Location map[5][5], string locnames[25] ) ;
```
The array of strings should be initialized in the main function of your program to contain abbreviated names of the all the game locations, in the order of their Location type (cast as an integer), i.e. something like this:
```
  locNames[(int)LOC_GRAVE] = "watery grave";
  locNames[(int)LOC_TOMB] = "undersea tomb";
  ...
```
The View function must use the locnames array to print the map instead of a big printf statement, so that if anything changes the map, it will still print correctly when View is called. Note that the full names of the locations should still be printed whenever Ringo moves from one location to another, however, so you will need to maintain abbreviated and unabbreviated names for every location.
Example:
```
% a.out
You're in the octopus garden.
Your action: v

watery grave    undersea tomb   DJ's locker     sinkhole        MD's locker

sand bar/grill  prawn shop      brine/spirits   crab            yellow sub

coral reef      pointy rocks    octopus         eels            smelts

shells          pirate ship     puppets         refinery        barnacles

manatee party   sea horses      sea cowboys     sea monkeys     visitor ctr

Your action: q
You quit, bored of undersea life already.
```