2 * wumpus.c --- a faithful translation of the classic "Hunt The Wumpus" game.
4 * Translator: Eric S. Raymond <esr@snark.thyrsus.com>
5 * Version: $Id: wumpus.c,v 1.3 1993/11/07 19:19:27 esr Exp esr $
7 * This was the state of the art 20 years ago, in 1972. We've come a long
10 * The BASIC source is that posted by Magnus Olsson in USENET article
11 * <9207071854.AA21847@thep.lu.se>: he wrote
13 * >Below is the source code for _one_ (rather simple) Wumpus version,
14 * >which I found in the PC-BLUE collection on SIMTEL20. I believe this is
15 * >pretty much the same version that was published in David Ahl's "101
16 * >Basic Computer Games" (or, possibly, in the sequel).
18 * I have staunchly resisted the temptation to "improve" this game. It
19 * is functionally identical to the BASIC version (source for which
20 * appears in the comments). I fixed some typos in the help text.
22 * Language hackers may be interested to know that he most difficult thing
23 * about the translation was tracking the details required to translate from
24 * 1-origin to 0-origin array indexing.
26 * The only enhancement is a an -s command-line switch for setting the
29 * So, pretend for a little while that your workstation is an ASR-33 and
30 * limber up your fingers for a trip to nostalgia-land...
36 /* 5 REM *** HUNT THE WUMPUS *** */
41 static int j, k, arrows, scratchloc;
42 static char inp[BUFSIZ]; /* common input buffer */
51 static int loc[LOCS], save[LOCS]; /* locations */
58 /* 80 REM *** SET UP CAVE (DODECAHEDRAL NODE LIST) *** */
60 /* 90 FOR J=1 TO 20 */
65 /* 115 DATA 2,5,8,1,3,10,2,4,12,3,5,14,1,4,6 */
66 /* 120 DATA 5,7,15,6,8,17,1,7,9,8,10,18,2,9,11 */
67 /* 125 DATA 10,12,19,3,11,13,12,14,20,4,13,15,6,14,16 */
68 /* 130 DATA 15,17,20,7,16,18,9,17,19,11,18,20,13,16,19 */
69 static int cave[20][3] =
93 /* 135 DEF FNA(X)=INT(20*RND(1))+1 */
94 #define FNA() (rand() % 20)
96 /* 140 DEF FNB(X)=INT(3*RND(1))+1 */
97 #define FNB() (rand() % 3)
99 /* 145 DEF FNC(X)=INT(4*RND(1))+1 */
100 #define FNC() (rand() % 4)
105 (void) printf("%s\n?", prompt);
106 if (fgets(inp, sizeof(inp), stdin))
117 (void) printf("%s\n?", prompt);
118 if (fgets(inp, sizeof(inp), stdin))
119 return(toupper(inp[0]));
126 void print_instructions()
130 /* 375 REM *** INSTRUCTIONS *** */
131 /* 380 PRINT "WELCOME TO 'HUNT THE WUMPUS'" */
132 puts("WELCOME TO 'HUNT THE WUMPUS'");
133 /* 385 PRINT " THE WUMPUS LIVES IN A CAVE OF 20 ROOMS. EACH ROOM" */
134 puts(" THE WUMPUS LIVES IN A CAVE OF 20 ROOMS. EACH ROOM");
135 /* 390 PRINT "HAS 3 TUNNELS LEADING TO OTHER ROOMS. (LOOK AT A" */
136 puts("HAS 3 TUNNELS LEADING TO OTHER ROOMS. (LOOK AT A");
137 /* 395 PRINT "DODECAHEDRON TO SEE HOW THIS WORKS-IF YOU DON'T KNOW" */
138 puts("DODECAHEDRON TO SEE HOW THIS WORKS-IF YOU DON'T KNOW");
139 /* 400 PRINT "WHAT A DODECAHEDRON IS, ASK SOMEONE)" */
140 puts("WHAT A DODECAHEDRON IS, ASK SOMEONE)");
143 /* 410 PRINT " HAZARDS:" */
145 /* 415 PRINT " BOTTOMLESS PITS - TWO ROOMS HAVE BOTTOMLESS PITS IN THEM */
146 puts(" BOTTOMLESS PITS - TWO ROOMS HAVE BOTTOMLESS PITS IN THEM");
147 /* 420 PRINT " IF YOU GO THERE, YOU FALL INTO THE PIT (& LOSE!)" */
148 puts(" IF YOU GO THERE, YOU FALL INTO THE PIT (& LOSE!)");
149 /* 425 PRINT " SUPER BATS - TWO OTHER ROOMS HAVE SUPER BATS. IF YOU" */
150 puts(" SUPER BATS - TWO OTHER ROOMS HAVE SUPER BATS. IF YOU");
151 /* 430 PRINT " GO THERE, A BAT GRABS YOU AND TAKES YOU TO SOME OTHER" */
152 puts(" GO THERE, A BAT GRABS YOU AND TAKES YOU TO SOME OTHER");
153 /* 435 PRINT " ROOM AT RANDOM. (WHICH MAY BE TROUBLESOME)" */
154 puts(" ROOM AT RANDOM. (WHICH MAY BE TROUBLESOME)");
155 /* 440 INPUT "TYPE AN E THEN RETURN ";W9 */
156 (void) getlet("TYPE AN E THEN RETURN ");
157 /* 445 PRINT " WUMPUS:" */
159 /* 450 PRINT " THE WUMPUS IS NOT BOTHERED BY HAZARDS (HE HAS SUCKER" */
160 puts(" THE WUMPUS IS NOT BOTHERED BY HAZARDS (HE HAS SUCKER");
161 /* 455 PRINT " FEET AND IS TOO BIG FOR A BAT TO LIFT). USUALLY" */
162 puts(" FEET AND IS TOO BIG FOR A BAT TO LIFT). USUALLY");
163 /* 460 PRINT " HE IS ASLEEP. TWO THINGS WAKE HIM UP: YOU SHOOTING AN" */
164 puts(" HE IS ASLEEP. TWO THINGS WAKE HIM UP: YOU SHOOTING AN");
165 /* 465 PRINT "ARROW OR YOU ENTERING HIS ROOM." */
166 puts("ARROW OR YOU ENTERING HIS ROOM.");
167 /* 470 PRINT " IF THE WUMPUS WAKES HE MOVES (P=.75) ONE ROOM" */
168 puts(" IF THE WUMPUS WAKES HE MOVES (P=.75) ONE ROOM");
169 /* 475 PRINT " OR STAYS STILL (P=.25). AFTER THAT, IF HE IS WHERE YOU" */
170 puts(" OR STAYS STILL (P=.25). AFTER THAT, IF HE IS WHERE YOU");
171 /* 480 PRINT " ARE, HE EATS YOU UP AND YOU LOSE!" */
172 puts(" ARE, HE EATS YOU UP AND YOU LOSE!");
175 /* 490 PRINT " YOU:" */
177 /* 495 PRINT " EACH TURN YOU MAY MOVE OR SHOOT A CROOKED ARROW" */
178 puts(" EACH TURN YOU MAY MOVE OR SHOOT A CROOKED ARROW");
179 /* 500 PRINT " MOVING: YOU CAN MOVE ONE ROOM (THRU ONE TUNNEL)" */
180 puts(" MOVING: YOU CAN MOVE ONE ROOM (THRU ONE TUNNEL)");
181 /* 505 PRINT " ARROWS: YOU HAVE 5 ARROWS. YOU LOSE WHEN YOU RUN OUT */
182 puts(" ARROWS: YOU HAVE 5 ARROWS. YOU LOSE WHEN YOU RUN OUT");
183 /* 510 PRINT " EACH ARROW CAN GO FROM 1 TO 5 ROOMS. YOU AIM BY TELLING*/
184 puts(" EACH ARROW CAN GO FROM 1 TO 5 ROOMS. YOU AIM BY TELLING");
185 /* 515 PRINT " THE COMPUTER THE ROOM#S YOU WANT THE ARROW TO GO TO." */
186 puts(" THE COMPUTER THE ROOM#S YOU WANT THE ARROW TO GO TO.");
187 /* 520 PRINT " IF THE ARROW CAN'T GO THAT WAY (IF NO TUNNEL) IT MOVES"*/
188 puts(" IF THE ARROW CAN'T GO THAT WAY (IF NO TUNNEL) IT MOVES");
189 /* 525 PRINT " AT RANDOM TO THE NEXT ROOM." */
190 puts(" AT RANDOM TO THE NEXT ROOM.");
191 /* 530 PRINT " IF THE ARROW HITS THE WUMPUS, YOU WIN." */
192 puts(" IF THE ARROW HITS THE WUMPUS, YOU WIN.");
193 /* 535 PRINT " IF THE ARROW HITS YOU, YOU LOSE." */
194 puts(" IF THE ARROW HITS YOU, YOU LOSE.");
195 /* 540 INPUT "TYPE AN E THEN RETURN ";W9 */
196 (void) getlet("TYPE AN E THEN RETURN ");
197 /* 545 PRINT " WARNINGS:" */
199 /* 550 PRINT " WHEN YOU ARE ONE ROOM AWAY FROM A WUMPUS OR HAZARD," */
200 puts(" WHEN YOU ARE ONE ROOM AWAY FROM A WUMPUS OR HAZARD,");
201 /* 555 PRINT " THE COMPUTER SAYS:" */
202 puts(" THE COMPUTER SAYS:");
203 /* 560 PRINT " WUMPUS: 'I SMELL A WUMPUS'" */
204 puts(" WUMPUS: 'I SMELL A WUMPUS'");
205 /* 565 PRINT " BAT : 'BATS NEARBY'" */
206 puts(" BAT : 'BATS NEARBY'");
207 /* 570 PRINT " PIT : 'I FEEL A DRAFT'" */
208 puts(" PIT : 'I FEEL A DRAFT'");
216 /* 585 REM *** PRINT LOCATION & HAZARD WARNINGS *** */
220 /* 595 FOR J=2 TO 6 */
221 /* 600 FOR K=1 TO 3 */
222 /* 605 IF S(L(1),K)<>L(J) THEN 640 */
223 /* 610 ON J-1 GOTO 615,625,625,635,635 */
224 /* 615 PRINT "I SMELL A WUMPUS!" */
226 /* 625 PRINT "I FEEL A DRAFT" */
228 /* 635 PRINT "BATS NEARBY!" */
231 for (k = 0; k < 3; k++)
233 int room = cave[loc[YOU]][k];
235 if (room == loc[WUMPUS])
236 (void) puts("I SMELL A WUMPUS!");
237 else if (room == loc[PIT1] || room == loc[PIT2])
238 (void) puts("I FEEL A DRAFT");
239 else if (room == loc[BATS1] || room == loc[BATS2])
240 (void) puts("BATS NEARBY!");
243 /* 650 PRINT "YOU ARE IN ROOM "L(1) */
244 (void) printf("YOU ARE IN ROOM %d\n", loc[YOU]+1);
246 /* 655 PRINT "TUNNELS LEAD TO "S(L,1);S(L,2);S(L,3) */
247 (void) printf("TUNNELS LEAD TO %d %d %d\n",
248 cave[loc[YOU]][0]+1, cave[loc[YOU]][1]+1, cave[loc[YOU]][2]+1);
260 /* 670 REM *** CHOOSE OPTION *** */
263 /* 675 PRINT "SHOOT OR MOVE (S-M)"; */
265 c = getlet("SHOOT OR MOVE (S-M)");
267 /* 685 IF I$<>"S" THEN 700 */
270 /* 700 IF I$<>"M" THEN 675 */
285 extern void check_shot(), move_wumpus();
288 /* 715 REM *** ARROW ROUTINE *** */
292 /* 725 REM *** PATH OF ARROW *** */
294 /* 735 PRINT "NO. OF ROOMS (1-5)"; */
296 j9 = getnum("NO. OF ROOMS (1-5)");
298 /* 745 IF J9<1 THEN 735 */
299 /* 750 IF J9>5 THEN 735 */
300 if (j9 < 1 || j9 > 5)
303 /* 755 FOR K=1 TO J9 */
304 for (k = 0; k < j9; k++)
306 /* 760 PRINT "ROOM #"; */
308 path[k] = getnum("ROOM #") - 1;
310 /* 770 IF K<=2 THEN 790 */
314 /* 775 IF P(K)<>P(K-2) THEN 790 */
315 if (path[k] != path[k - 2])
318 /* 780 PRINT "ARROWS AREN'T THAT CROOKED - TRY ANOTHER ROOM" */
319 (void) puts("ARROWS AREN'T THAT CROOKED - TRY ANOTHER ROOM");
326 /* 795 REM *** SHOOT ARROW *** */
328 scratchloc = loc[YOU];
330 /* 805 FOR K=1 TO J9 */
331 for (k = 0; k < j9; k++)
335 /* 810 FOR K1=1 TO 3 */
336 for (k1 = 0; k1 < 3; k1++)
338 /* 815 IF S(L,K1)=P(K) THEN 895 */
339 if (cave[scratchloc][k1] == path[k])
342 * This is the only bit of the translation I'm not sure
343 * about. It requires the trajectory of the arrow to
344 * be a path. Without it, all rooms on the trajectory
345 * would be required by the above to be adjacent to the
346 * player, making for a trivial game --- just move to where
347 * you smell a wumpus and shoot into all adjacent passages!
348 * However, I can't find an equivalent in the BASIC.
350 scratchloc = path[k];
352 /* this simulates logic at 895 in the BASIC code */
361 /* 825 REM *** NO TUNNEL FOR ARROW *** */
362 /* 830 L=S(L,FNB(1)) */
363 scratchloc = cave[scratchloc][FNB()];
374 /* 845 PRINT "MISSED" */
375 (void) puts("MISSED");
378 scratchloc = loc[YOU];
380 /* 855 REM *** MOVE WUMPUS *** */
384 /* 865 REM *** AMMO CHECK *** */
386 /* 875 IF A>0 THEN 885 */
397 /* 890 REM *** SEE IF ARROW IS AT L(1) OR AT L(2) */
400 /* 900 IF L<>L(2) THEN 920 */
401 /* 905 PRINT "AHA! YOU GOT THE WUMPUS!" */
404 if (scratchloc == loc[WUMPUS])
406 (void) puts("AHA! YOU GOT THE WUMPUS!");
410 /* 920 IF L<>L(1) THEN 840 */
411 /* 925 PRINT "OUCH! ARROW GOT YOU!" */
413 else if (scratchloc == loc[YOU])
415 (void) puts("OUCH! ARROW GOT YOU!");
422 /* 935 REM *** MOVE WUMPUS ROUTINE *** */
426 /* 945 IF K=4 THEN 955 */
427 /* 950 L(2)=S(L(2),K) */
429 loc[WUMPUS] = cave[loc[WUMPUS]][k];
431 /* 955 IF L(2)<>L THEN 970 */
432 if (loc[WUMPUS] != loc[YOU])
435 /* 960 PRINT "TSK TSK TSK - WUMPUS GOT YOU!" */
436 (void) puts("TSK TSK TSK - WUMPUS GOT YOU!");
446 /* 975 REM *** MOVE ROUTINE *** */
451 /* 985 PRINT "WHERE TO"; */
453 scratchloc = getnum("WHERE TO");
455 /* 995 IF L<1 THEN 985 */
456 /* 1000 IF L>20 THEN 985 */
457 if (scratchloc < 1 || scratchloc > 20)
461 /* 1005 FOR K=1 TO 3 */
462 for (k = 0; k < 3; k++)
464 /* 1010 REM *** CHECK IF LEGAL MOVE *** */
465 /* 1015 IF S(L(1),K)=L THEN 1045 */
466 if (cave[loc[YOU]][k] == scratchloc)
472 /* 1025 IF L=L(1) THEN 1045 */
473 if (scratchloc != loc[YOU])
475 /* 1030 PRINT "NOT POSSIBLE -"; */
476 (void) puts("NOT POSSIBLE -");
483 /* 1040 REM *** CHECK FOR HAZARDS *** */
485 loc[YOU] = scratchloc;
487 if (scratchloc == loc[WUMPUS])
489 /* 1050 REM *** WUMPUS *** */
490 /* 1055 IF L<>L(2) THEN 1090 */
491 /* 1060 PRINT "... OOPS! BUMPED A WUMPUS!" */
492 /* 1065 REM *** MOVE WUMPUS *** */
494 /* 1075 IF F=0 THEN 1090 */
496 (void) puts("... OOPS! BUMPED A WUMPUS!");
499 else if (scratchloc == loc[PIT1] || scratchloc == loc[PIT2])
501 /* 1085 REM *** PIT *** */
502 /* 1090 IF L=L(3) THEN 1100 */
503 /* 1095 IF L<>L(4) THEN 1120 */
504 /* 1100 PRINT "YYYYIIIIEEEE . . . FELL IN PIT" */
507 (void) puts("YYYYIIIIEEEE . . . FELL IN PIT");
510 else if (scratchloc == loc[BATS1] || scratchloc == loc[BATS2])
512 /* 1115 REM *** BATS *** */
513 /* 1120 IF L=L(5) THEN 1130 */
514 /* 1125 IF L<>L(6) THEN 1145 */
515 /* 1130 PRINT "ZAP--SUPER BAT SNATCH! ELSEWHEREVILLE FOR YOU!" */
520 (void) puts("ZAP--SUPER BAT SNATCH! ELSEWHEREVILLE FOR YOU!");
521 scratchloc = loc[YOU] = FNA();
532 if (argc >= 2 && strcmp(argv[1], "-s") == 0)
533 srand(atoi(argv[2]));
535 srand((int)time((long *) 0));
537 /* 15 PRINT "INSTRUCTIONS (Y-N)"; */
539 c = getlet("INSTRUCTIONS (Y-N)");
541 /* 25 IF I$="N" THEN 35 */
545 print_instructions();
547 /* 150 REM *** LOCATE L ARRAY ITEMS *** */
548 /* 155 REM *** 1-YOU, 2-WUMPUS, 3&4-PITS, 5&6-BATS *** */
552 /* 170 FOR J=1 TO 6 */
553 /* 175 L(J)=FNA(0) */
556 for (j = 0; j < LOCS; j++)
557 loc[j] = save[j] = FNA();
559 /* 190 REM *** CHECK FOR CROSSOVERS (IE L(1)=L(2), ETC) *** */
560 /* 195 FOR J=1 TO 6 */
561 /* 200 FOR K=1 TO 6 */
562 /* 205 IF J=K THEN 215 */
563 /* 210 IF L(J)=L(K) THEN 170 */
566 for (j = 0; j < LOCS; j++)
567 for (k = 0; k < LOCS; k++)
570 else if (loc[j] == loc[k])
573 /* 225 REM *** SET NO. OF ARROWS *** */
578 scratchloc = loc[YOU];
580 /* 240 REM *** RUN THE GAME *** */
581 /* 245 PRINT "HUNT THE WUMPUS" */
582 (void) puts("HUNT THE WUMPUS");
585 (void) printf("Wumpus is at %d, pits at %d & %d, bats at %d & %d\n",
587 loc[PIT1]+1, loc[PIT2]+1,
588 loc[BATS1]+1, loc[BATS2]+1);
592 /* 250 REM *** HAZARD WARNING AND LOCATION *** */
596 /* 260 REM *** MOVE OR SHOOT *** */
598 /* 270 ON O GOTO 280,300 */
601 /* 275 REM *** SHOOT *** */
605 /* 285 IF F=0 THEN 255 */
613 /* 295 REM *** MOVE *** */
617 /* 305 IF F=0 THEN 255 */
622 /* 310 IF F>0 THEN 335 */
623 if (finished == LOSE)
625 /* 315 REM *** LOSE *** */
626 /* 320 PRINT "HA HA HA - YOU LOSE!" */
628 (void) puts("HA HA HA - YOU LOSE!");
632 /* 330 REM *** WIN *** */
633 /* 335 PRINT "HEE HEE HEE - THE WUMPUS'LL GET YOU NEXT TIME!!" */
634 (void) puts("HEE HEE HEE - THE WUMPUS'LL GET YOU NEXT TIME!!");
637 /* 340 FOR J=1 TO 6 */
640 for (j = YOU; j < LOCS; j++)
643 /* 355 PRINT "SAME SETUP (Y-N)"; */
645 c = getlet("SAME SETUP (Y-N)");
647 /* 365 IF I$<>"Y"THEN 170 */
655 /* wumpus.c ends here */