Hunt the Wumpus - or - Call Me Sentimental

REBOL[ Title: "Hunt the Wumpus" Date: 22-Oct-2001 Author: "Gregg Irwin" EMail: [greggirwin--acm--org] Comment: { I found an old version, in C (by Eric Raymond), which was adapted from an even older version, in BASIC (by Magnus Olsson), that had been found in a SIMTEL archive. It's got lineage. As of 22-Oct-2001, it appears to work, though I haven't traced the arrow path'ing logic yet nor made it smart. Arrows can go pretty much anywhere you tell them and, yes, you can shoot yourself as in the original. I tweaked a few strings, but the instructions are almost unscathed. Ahhh, it takes me back to my Dad's HP85 with the built-in 5 inch monochrome screen, tape drive, and thermal printer... } ] ; Setup ; initialize arrow count ; randomly place bats, pits, wumpus, and player ; make a working copy of the starting locations. ; Check-for-hazards ; Each Turn ; ask player to move or shoot ; if shoot ; check for hit on self and wumpus ; move wumpus ; if move ; check-for-hazards ; until player dead, wumpus dead, or out of arrows arrow-count: 0 ; indexes into location block player: 1 wumpus: 2 pit-1: 3 pit-2: 4 bats-1: 5 bats-2: 6 protect [player wumpus pit-1 pit-2 bats-1 bats-2] loc: [] save: [] winner: none finished: false ; The cave is a dodecahedron. Each block is a room containing the ; number for the rooms it is connected to. cave: [ [2 5 8] [1 3 10] [2 4 12] [3 5 14] [1 4 6] [5 7 15] [6 8 17] [1 7 9] [8 10 18] [2 9 11] [10 12 19] [3 11 13] [12 14 20] [4 13 15] [6 14 16] [15 17 20] [7 16 18] [9 17 19] [11 18 20] [13 16 19] ] random-room: does [random 20] random-direction: does [random 3] get-num: func [prompt] [ if error? try [return to-integer ask prompt] [ return 0 ] ] print-instructions: does [ print { WELCOME TO 'HUNT THE WUMPUS' (love that all caps retro look) THE WUMPUS LIVES IN A CAVE OF 20 ROOMS. EACH ROOM HAS 3 TUNNELS LEADING TO OTHER ROOMS. HAZARDS: BOTTOMLESS PITS - TWO ROOMS HAVE BOTTOMLESS PITS IN THEM. IF YOU GO THERE, YOU FALL INTO THE PIT (YOU LOSE!) SUPER BATS - TWO OTHER ROOMS HAVE SUPER BATS. IF YOU GO THERE, A BAT GRABS YOU AND TAKES YOU TO SOME OTHER ROOM AT RANDOM. (WHICH MAY BE TROUBLESOME) WUMPUS: THE WUMPUS IS NOT BOTHERED BY HAZARDS (HE HAS SUCKER FEET AND IS TOO BIG FOR A BAT TO LIFT). USUALLY HE IS ASLEEP. TWO THINGS WAKE HIM UP: YOU SHOOTING AN ARROW OR YOU ENTERING HIS ROOM. IF THE WUMPUS WAKES HE MOVES ONE ROOM (75% chance) OR STAYS STILL (25% chance). AFTER THAT, IF HE IS WHERE YOU ARE, HE EATS YOU UP AND YOU LOSE! YOU: EACH TURN YOU MAY MOVE OR SHOOT A CROOKED ARROW. MOVING: YOU CAN MOVE ONE ROOM (THROUGH ONE TUNNEL). ARROWS: YOU HAVE 5 ARROWS. YOU LOSE WHEN YOU RUN OUT. EACH ARROW CAN GO FROM 1 TO 5 ROOMS. YOU AIM BY TELLING THE COMPUTER THE ROOMS YOU WANT THE ARROW TO GO TO. IF THE ARROW CAN'T GO THAT WAY (I.E. NO TUNNEL) IT MOVES AT RANDOM TO THE NEXT ROOM. * IF THE ARROW HITS THE WUMPUS, YOU WIN. * IF THE ARROW HITS YOU, YOU LOSE. WARNINGS: WHEN YOU ARE ONE ROOM AWAY FROM A WUMPUS OR HAZARD, THE COMPUTER SAYS: WUMPUS: 'YOU SMELL A WUMPUS' BAT : 'YOU HEAR BATS' PIT : 'YOU FEEL A DRAFT' } ask "Press <Enter> when you're ready to start the game" ] check-for-hazards: func [/local i] [ print "" print ["You are in room " loc/:player] print ["Tunnels lead to " pick cave loc/:player] ; Look at each of the 3 rooms around the player to see if the contain ; the wumpus, a pit, or bats. for i 1 3 1 [ room: pick pick cave loc/:player i if (room = loc/:wumpus) [print " You smell a wumpus!"] if any [(room = loc/:pit-1) (room = loc/:pit-2)] [print " You feel a draft!"] if any [(room = loc/:bats-1) (room = loc/:bats-2)] [print " You hear bats!"] ] print "" ] move-or-shoot?: func [/local cmd] [ cmd: ask "Shoot or move (S/M)? " ; The default case handles bad inputs and prompts the user again. switch/default cmd [ "S" ['shoot] "M" ['move] ][move-or-shoot?] ] move-arrow: func [room path /local i rnd-rm] [ ;print reduce ["move arrow" room tab path] if not tail? path [ either find cave/:room first path [ ; next item in path is valid check-for-arrow-hit first path if finished [return] ; Recursive call move-arrow first path next path ][ ; pick a random direction i: random-direction check-for-arrow-hit rnd-rm: cave/:room/:i if finished [return] ; Recursive call move-arrow rnd-rm next path ] ] ] shoot: func [/local path] [ path: to-block ask "Enter 1 to 5 room numbers for the arrow's path: " move-arrow loc/:player path if not finished [print "Your arrow missed"] move-wumpus ; See if the Wumpus moved onto the player if finished [return] arrow-count: arrow-count - 1 if (arrow-count <= 0) [ print reduce [newline "You ran out of arrows..."] winner: 'wumpus finished: true return ] check-for-hazards ] check-for-arrow-hit: func [room] [ if (room = loc/:wumpus) [ print reduce [newline "You got the Wumpus!"] winner: 'player finished: true return ] if (room = loc/:player) [ print reduce [newline "You shot yourself!"] winner: 'arrow finished: true return ] ] ; 75% chance that it will move wumpus-moves?: does [either (random 4) < 4 [true][false]] move-wumpus: does [ if wumpus-moves? [loc/2: pick (pick cave loc/:wumpus) random-direction] if (loc/:wumpus = loc/:player) [ winner: 'wumpus finished: true ] ] move-player: func [/bat-move new-loc /local new-player-loc] [ either bat-move [ loc/1: new-loc ][ new-player-loc: get-num "To which room? " ; Call recursively, then bail, if bad input if any [(new-player-loc < 1) (new-player-loc > 20)] [ move-player return ] ; Call recursively, then bail, if illegal move if not find pick cave loc/:player new-player-loc [ print "You can't move there, unless you plan to dig a new tunnel." move-player return ] ; It was a legal move, so update the player's location. change at loc player new-player-loc ] if (loc/:player = loc/:wumpus) [ print "Yikes! You bumped the Wumpus!" move-wumpus ; See if the Wumpus moved onto the player if finished [return] ] if any [(loc/:player = loc/:pit-1) (loc/:player = loc/:pit-2) ] [ print reduce [newline "Aaiiiiieeeee....(you fell in a pit)"] winner: 'pit finished: true return ] if any [(loc/:player = loc/:bats-1) (loc/:player = loc/:bats-2) ] [ print "ZAP! Super-Bat snatch! Elsewhereville for you!" move-player/bat-move random-room return ] check-for-hazards ] ; This is ugly, but it works for now and avoids setup collisions. ; Don't really need items for this, but I'd like to improve it and then I might. init-locations: func [/local items avail-rooms result offset] [ random/seed now/time/precise items: [player wumpus pit-1 pit-2 bats-1 bats-2] avail-rooms: copy [1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20] result: make block! length? items repeat i length? items [ ; Too dense for one line? ;append result pick avail-rooms offset: random length? avail-rooms offset: random/secure length? avail-rooms append result pick avail-rooms offset remove at avail-rooms offset ] return result ] setup: func [/same-as-last] [ ; Initialize arrow count. arrow-count: 5 ; If we haven't setup before, or they want the same setup, ; there's no need to initialize. if any [(not same-as-last) (start-loc = none)] [ ; Randomly place bats, pits, wumpus, and player start-loc: init-locations ] ; Make a working copy of the starting locations. loc: copy start-loc ] do-game: func [/same-as-last] [ either same-as-last [ setup/same-as-last ][ setup ] check-for-hazards while [not finished] [ either move-or-shoot? = 'shoot [shoot][move-player] ] print switch winner [ wumpus ["<SNARF> The Wumpus got you!!!"] player ["<BLARP> The Wumpus will get you next time!"] pit ["<SPLAT> Better luck next time"] arrow ["<GLURG> You really should be more careful"] ] print "" ] start: does [ if (ask "Would you like instructions (Y/N)? ") = "Y" [ print-instructions ] play: "Y" same-setup: "N" while [play = "Y"] [ either same-setup = "N" [ do-game ][ do-game/same-as-last ] play: ask "Play again (Y/N)? " if play = "Y" [ winner: none finished: false same-setup: ask "Same setup (Y/N)? " ] ] ] start

wanna send it to me? I get invalid string crap. Enjoy!! Ammon

Hi Gregg, Just in case you didn't know, you can use 'has as a shorthand for functions with local variables but no parameters myfunc: has [ v1 v2 .. ] [ ] -- Graham Chiu

That's because it has line feeds thrown in at random points (line wrap on at column 80 perhaps?)!! hehe.. I just made my way through and fixed it up.. kind of neat little game! -Matt

On Tue, 23 Oct 2001 00:50:47 -0700 "Ammon Johnson" <[ammonjohnson--yahoo--com]> wrote:

> wanna send it to me? I get invalid string crap. >

On 23-Oct-01, Gregg Irwin wrote: a HUNT THE WUMPUS game! But I shot it in the second game. BTW, you use 'save as a word, which isn't the best of REBOL words to commandeer... You're sentimental. (: -- Carl Read

Oh, Duh! Some people need help to think! Enjoy!! Ammon

> Ahhh, it takes me back to my Dad's HP85 with the built-in 5 inch > monochrome screen, tape drive, and thermal printer...

Hi Ammon, et al << wanna send it to me? I get invalid string crap. >> Garrrrrhhh! Line wrapping. Sorry about that. --Gregg

Hi Graham, << Just in case you didn't know, you can use 'has as a shorthand for functions with local variables but no parameters >> Yeah, I actually know about it but I'm still trying to decide which REBOL words I like and where it's clearer to be consistent even if it means a little more typing. E.g. is it confusing, especially to newcomers, to have func, function, has, and does mixed throughout the code? 'has is also adds the fact that you don't need to use /local with it. On one hand I like reducing clutter but, on the other, we have to maintain clarity of intent and easy scanning of code. I'm still learning so my style may be inconsistent for some time yet. Thanks though! There's a lot I don't know so always feel free to point out improvements I can make. --Gregg

Hi Carl, << BTW, you use 'save as a word, which isn't the best of REBOL words to commandeer...>> DOH! Thanks very much. It was actually a left-over and not used. Even worse. :) --Gregg

Ok since you guys are at it... ;-) Remember the vic-20 or the tandy TRS-80 color computer !? those were the most fun computers to program... (it might help that I was around 10 years old at the time ;-) yep them old tape drives... I remember being all exited when I finally got myself the computer-controled tape drive! imagine that... how much technology do you need... the computer can start and stop the (basically a Hi Fidelity audio) tape recorder, so you don't need to run around the table to do it yourself... (you still had to rewind it by hand though...I always found that odd). Computers where so much fun then... hardly anything being more standard than the fact that the BASIC language having numbers for its lines... (If I remember correctly, BASIC is the actuall only thing ever programmed (in part) by Bill Gates himself... everything else ... well you all know the rest...) I remember when optimizing code meant to shorten the variable names, because you needed the few extra 20-100 bytes to finish your code... because there was not enough of RAM in the system to fit the actual source of the application within the computer's ram... shorter names also meant drastically faster code on some platforms... I even remember building myself a codec which converted string and array data into pictures (using equivalents of peeks and pokes!) so that I could use the graphics RAM of my TRS-80 for data. That way I could have more than the (shared) code/data RAM limit (If I didn't use the graphics rasters, of course!). ah, well, I have to get back to reality and to REBOL... (I'm currently building a multi-track timeline for process control.... its quite a challege trying to weed out View's weird event handling problems) -Maxim