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 1.4 1996/05/17 17:30:35 esr Exp esr $
7 * The BASIC source is that posted by Magnus Olsson in USENET article
8 * <9207071854.AA21847@thep.lu.se>: he wrote
10 * >Below is the source code for _one_ (rather simple) Wumpus version,
11 * >which I found in the PC-BLUE collection on SIMTEL20. I believe this is
12 * >pretty much the same version that was published in David Ahl's "101
13 * >Basic Computer Games" (or, possibly, in the sequel).
15 * I have staunchly resisted the temptation to "improve" this game. It
16 * is functionally identical to the BASIC version (source for which
17 * appears in the comments). I fixed some typos in the help text.
19 * Language hackers may be interested to know that he most difficult thing
20 * about the translation was tracking the details required to translate from
21 * 1-origin to 0-origin array indexing.
23 * The only enhancement is a an -s command-line switch for setting the
26 * So, pretend for a little while that your workstation is an ASR-33 and
27 * limber up your fingers for a trip to nostalgia-land...
29 * SPDX-License-Identifier: BSD-2-Clause
38 #include <sys/socket.h>
40 /* 5 REM *** HUNT THE WUMPUS *** */
45 static int j, k, arrows, scratchloc;
46 static char inp[BUFSIZ]; /* common input buffer */
55 static int loc[LOCS], save[LOCS]; /* locations */
62 /* 80 REM *** SET UP CAVE (DODECAHEDRAL NODE LIST) *** */
64 /* 90 FOR J=1 TO 20 */
69 /* 115 DATA 2,5,8,1,3,10,2,4,12,3,5,14,1,4,6 */
70 /* 120 DATA 5,7,15,6,8,17,1,7,9,8,10,18,2,9,11 */
71 /* 125 DATA 10,12,19,3,11,13,12,14,20,4,13,15,6,14,16 */
72 /* 130 DATA 15,17,20,7,16,18,9,17,19,11,18,20,13,16,19 */
73 static int cave[20][3] =
97 /* 135 DEF FNA(X)=INT(20*RND(1))+1 */
98 #define FNA() (rand() % 20)
100 /* 140 DEF FNB(X)=INT(3*RND(1))+1 */
101 #define FNB() (rand() % 3)
103 /* 145 DEF FNC(X)=INT(4*RND(1))+1 */
104 #define FNC() (rand() % 4)
109 (void) printf("%s\n?", prompt);
110 if (fgets(inp, sizeof(inp), stdin))
121 (void) printf("%s\n?", prompt);
122 if (fgets(inp, sizeof(inp), stdin))
123 return(toupper(inp[0]));
130 void print_instructions()
132 /* 375 REM *** INSTRUCTIONS *** */
133 /* 380 PRINT "WELCOME TO 'HUNT THE WUMPUS'" */
134 puts("WELCOME TO 'HUNT THE WUMPUS'");
135 /* 385 PRINT " THE WUMPUS LIVES IN A CAVE OF 20 ROOMS. EACH ROOM" */
136 puts(" THE WUMPUS LIVES IN A CAVE OF 20 ROOMS. EACH ROOM");
137 /* 390 PRINT "HAS 3 TUNNELS LEADING TO OTHER ROOMS. (LOOK AT A" */
138 puts("HAS 3 TUNNELS LEADING TO OTHER ROOMS. (LOOK AT A");
139 /* 395 PRINT "DODECAHEDRON TO SEE HOW THIS WORKS-IF YOU DON'T KNOW" */
140 puts("DODECAHEDRON TO SEE HOW THIS WORKS-IF YOU DON'T KNOW");
141 /* 400 PRINT "WHAT A DODECAHEDRON IS, ASK SOMEONE)" */
142 puts("WHAT A DODECAHEDRON IS, ASK SOMEONE)");
145 /* 410 PRINT " HAZARDS:" */
147 /* 415 PRINT " BOTTOMLESS PITS - TWO ROOMS HAVE BOTTOMLESS PITS IN THEM */
148 puts(" BOTTOMLESS PITS - TWO ROOMS HAVE BOTTOMLESS PITS IN THEM");
149 /* 420 PRINT " IF YOU GO THERE, YOU FALL INTO THE PIT (& LOSE!)" */
150 puts(" IF YOU GO THERE, YOU FALL INTO THE PIT (& LOSE!)");
151 /* 425 PRINT " SUPER BATS - TWO OTHER ROOMS HAVE SUPER BATS. IF YOU" */
152 puts(" SUPER BATS - TWO OTHER ROOMS HAVE SUPER BATS. IF YOU");
153 /* 430 PRINT " GO THERE, A BAT GRABS YOU AND TAKES YOU TO SOME OTHER" */
154 puts(" GO THERE, A BAT GRABS YOU AND TAKES YOU TO SOME OTHER");
155 /* 435 PRINT " ROOM AT RANDOM. (WHICH MAY BE TROUBLESOME)" */
156 puts(" ROOM AT RANDOM. (WHICH MAY BE TROUBLESOME)");
157 /* 440 INPUT "TYPE AN E THEN RETURN ";W9 */
158 (void) getlet("TYPE AN E THEN RETURN ");
159 /* 445 PRINT " WUMPUS:" */
161 /* 450 PRINT " THE WUMPUS IS NOT BOTHERED BY HAZARDS (HE HAS SUCKER" */
162 puts(" THE WUMPUS IS NOT BOTHERED BY HAZARDS (HE HAS SUCKER");
163 /* 455 PRINT " FEET AND IS TOO BIG FOR A BAT TO LIFT). USUALLY" */
164 puts(" FEET AND IS TOO BIG FOR A BAT TO LIFT). USUALLY");
165 /* 460 PRINT " HE IS ASLEEP. TWO THINGS WAKE HIM UP: YOU SHOOTING AN" */
166 puts(" HE IS ASLEEP. TWO THINGS WAKE HIM UP: YOU SHOOTING AN");
167 /* 465 PRINT "ARROW OR YOU ENTERING HIS ROOM." */
168 puts("ARROW OR YOU ENTERING HIS ROOM.");
169 /* 470 PRINT " IF THE WUMPUS WAKES HE MOVES (P=.75) ONE ROOM" */
170 puts(" IF THE WUMPUS WAKES HE MOVES (P=.75) ONE ROOM");
171 /* 475 PRINT " OR STAYS STILL (P=.25). AFTER THAT, IF HE IS WHERE YOU" */
172 puts(" OR STAYS STILL (P=.25). AFTER THAT, IF HE IS WHERE YOU");
173 /* 480 PRINT " ARE, HE EATS YOU UP AND YOU LOSE!" */
174 puts(" ARE, HE EATS YOU UP AND YOU LOSE!");
177 /* 490 PRINT " YOU:" */
179 /* 495 PRINT " EACH TURN YOU MAY MOVE OR SHOOT A CROOKED ARROW" */
180 puts(" EACH TURN YOU MAY MOVE OR SHOOT A CROOKED ARROW");
181 /* 500 PRINT " MOVING: YOU CAN MOVE ONE ROOM (THRU ONE TUNNEL)" */
182 puts(" MOVING: YOU CAN MOVE ONE ROOM (THRU ONE TUNNEL)");
183 /* 505 PRINT " ARROWS: YOU HAVE 5 ARROWS. YOU LOSE WHEN YOU RUN OUT */
184 puts(" ARROWS: YOU HAVE 5 ARROWS. YOU LOSE WHEN YOU RUN OUT");
185 /* 510 PRINT " EACH ARROW CAN GO FROM 1 TO 5 ROOMS. YOU AIM BY TELLING*/
186 puts(" EACH ARROW CAN GO FROM 1 TO 5 ROOMS. YOU AIM BY TELLING");
187 /* 515 PRINT " THE COMPUTER THE ROOM#S YOU WANT THE ARROW TO GO TO." */
188 puts(" THE COMPUTER THE ROOM#S YOU WANT THE ARROW TO GO TO.");
189 /* 520 PRINT " IF THE ARROW CAN'T GO THAT WAY (IF NO TUNNEL) IT MOVES"*/
190 puts(" IF THE ARROW CAN'T GO THAT WAY (IF NO TUNNEL) IT MOVES");
191 /* 525 PRINT " AT RANDOM TO THE NEXT ROOM." */
192 puts(" AT RANDOM TO THE NEXT ROOM.");
193 /* 530 PRINT " IF THE ARROW HITS THE WUMPUS, YOU WIN." */
194 puts(" IF THE ARROW HITS THE WUMPUS, YOU WIN.");
195 /* 535 PRINT " IF THE ARROW HITS YOU, YOU LOSE." */
196 puts(" IF THE ARROW HITS YOU, YOU LOSE.");
197 /* 540 INPUT "TYPE AN E THEN RETURN ";W9 */
198 (void) getlet("TYPE AN E THEN RETURN ");
199 /* 545 PRINT " WARNINGS:" */
201 /* 550 PRINT " WHEN YOU ARE ONE ROOM AWAY FROM A WUMPUS OR HAZARD," */
202 puts(" WHEN YOU ARE ONE ROOM AWAY FROM A WUMPUS OR HAZARD,");
203 /* 555 PRINT " THE COMPUTER SAYS:" */
204 puts(" THE COMPUTER SAYS:");
205 /* 560 PRINT " WUMPUS: 'I SMELL A WUMPUS'" */
206 puts(" WUMPUS: 'I SMELL A WUMPUS'");
207 /* 565 PRINT " BAT : 'BATS NEARBY'" */
208 puts(" BAT : 'BATS NEARBY'");
209 /* 570 PRINT " PIT : 'I FEEL A DRAFT'" */
210 puts(" PIT : 'I FEEL A DRAFT'");
218 /* 585 REM *** PRINT LOCATION & HAZARD WARNINGS *** */
222 /* 595 FOR J=2 TO 6 */
223 /* 600 FOR K=1 TO 3 */
224 /* 605 IF S(L(1),K)<>L(J) THEN 640 */
225 /* 610 ON J-1 GOTO 615,625,625,635,635 */
226 /* 615 PRINT "I SMELL A WUMPUS!" */
228 /* 625 PRINT "I FEEL A DRAFT" */
230 /* 635 PRINT "BATS NEARBY!" */
233 for (j = WUMPUS; j < LOCS; j++)
235 for (k = 0; k < 3; k++)
237 if (cave[loc[YOU]][k] != loc[j])
241 (void) puts("I SMELL A WUMPUS!");
242 else if (j == PIT1 || j == PIT2)
243 (void) puts("I FEEL A DRAFT");
244 else if (j == BATS1 || j == BATS2)
245 (void) puts("BATS NEARBY!");
249 /* 650 PRINT "YOU ARE IN ROOM "L(1) */
250 (void) printf("YOU ARE IN ROOM %d\n", loc[YOU]+1);
252 /* 655 PRINT "TUNNELS LEAD TO "S(L,1);S(L,2);S(L,3) */
253 (void) printf("TUNNELS LEAD TO %d %d %d\n",
254 cave[loc[YOU]][0]+1, cave[loc[YOU]][1]+1, cave[loc[YOU]][2]+1);
266 /* 670 REM *** CHOOSE OPTION *** */
269 /* 675 PRINT "SHOOT OR MOVE (S-M)"; */
271 c = getlet("SHOOT OR MOVE (S-M)");
273 /* 685 IF I$<>"S" THEN 700 */
276 /* 700 IF I$<>"M" THEN 675 */
291 extern void check_shot(), move_wumpus();
294 /* 715 REM *** ARROW ROUTINE *** */
298 /* 725 REM *** PATH OF ARROW *** */
300 /* 735 PRINT "NO. OF ROOMS (1-5)"; */
302 j9 = getnum("NO. OF ROOMS (1-5)");
304 /* 745 IF J9<1 THEN 735 */
305 /* 750 IF J9>5 THEN 735 */
306 if (j9 < 1 || j9 > 5)
309 /* 755 FOR K=1 TO J9 */
310 for (k = 0; k < j9; k++)
312 /* 760 PRINT "ROOM #"; */
314 path[k] = getnum("ROOM #") - 1;
316 /* 770 IF K<=2 THEN 790 */
320 /* 775 IF P(K)<>P(K-2) THEN 790 */
321 if (path[k] != path[k - 2])
324 /* 780 PRINT "ARROWS AREN'T THAT CROOKED - TRY ANOTHER ROOM" */
325 (void) puts("ARROWS AREN'T THAT CROOKED - TRY ANOTHER ROOM");
332 /* 795 REM *** SHOOT ARROW *** */
334 scratchloc = loc[YOU];
336 /* 805 FOR K=1 TO J9 */
337 for (k = 0; k < j9; k++)
342 (void) printf("Location is %d, looking for tunnel to room %d\n",
343 scratchloc+1, path[k]+1);
346 /* 810 FOR K1=1 TO 3 */
347 for (k1 = 0; k1 < 3; k1++)
349 /* 815 IF S(L,K1)=P(K) THEN 895 */
350 if (cave[scratchloc][k1] == path[k])
353 * This is the only bit of the translation I'm not sure
354 * about. It requires the trajectory of the arrow to
355 * be a path. Without it, all rooms on the trajectory
356 * would be required by the above to be adjacent to the
357 * player, making for a trivial game --- just move to where
358 * you smell a wumpus and shoot into all adjacent passages!
359 * However, I can't find an equivalent in the BASIC.
361 scratchloc = path[k];
364 (void) printf("Found tunnel to room %d\n", scratchloc+1);
367 /* this simulates logic at 895 in the BASIC code */
376 /* 825 REM *** NO TUNNEL FOR ARROW *** */
377 /* 830 L=S(L,FNB(1)) */
378 scratchloc = cave[scratchloc][FNB()];
381 (void) printf("No tunnel for room %d, new location is %d\n",
382 path[k]+1, scratchloc+1);
396 /* 845 PRINT "MISSED" */
397 (void) puts("MISSED");
400 scratchloc = loc[YOU];
402 /* 855 REM *** MOVE WUMPUS *** */
406 /* 865 REM *** AMMO CHECK *** */
408 /* 875 IF A>0 THEN 885 */
419 /* 890 REM *** SEE IF ARROW IS AT L(1) OR AT L(2) */
422 /* 900 IF L<>L(2) THEN 920 */
423 /* 905 PRINT "AHA! YOU GOT THE WUMPUS!" */
426 if (scratchloc == loc[WUMPUS])
428 (void) puts("AHA! YOU GOT THE WUMPUS!");
432 /* 920 IF L<>L(1) THEN 840 */
433 /* 925 PRINT "OUCH! ARROW GOT YOU!" */
435 else if (scratchloc == loc[YOU])
437 (void) puts("OUCH! ARROW GOT YOU!");
444 /* 935 REM *** MOVE WUMPUS ROUTINE *** */
448 /* 945 IF K=4 THEN 955 */
449 /* 950 L(2)=S(L(2),K) */
451 loc[WUMPUS] = cave[loc[WUMPUS]][k];
454 (void) printf("Wumpus location is now room %d\n", loc[WUMPUS]+1);
457 /* 955 IF L(2)<>L THEN 970 */
458 if (loc[WUMPUS] != loc[YOU])
461 /* 960 PRINT "TSK TSK TSK - WUMPUS GOT YOU!" */
462 (void) puts("TSK TSK TSK - WUMPUS GOT YOU!");
472 /* 975 REM *** MOVE ROUTINE *** */
477 /* 985 PRINT "WHERE TO"; */
479 scratchloc = getnum("WHERE TO");
481 /* 995 IF L<1 THEN 985 */
482 /* 1000 IF L>20 THEN 985 */
483 if (scratchloc < 1 || scratchloc > 20)
487 /* 1005 FOR K=1 TO 3 */
488 for (k = 0; k < 3; k++)
490 /* 1010 REM *** CHECK IF LEGAL MOVE *** */
491 /* 1015 IF S(L(1),K)=L THEN 1045 */
492 if (cave[loc[YOU]][k] == scratchloc)
498 /* 1025 IF L=L(1) THEN 1045 */
499 if (scratchloc != loc[YOU])
501 /* 1030 PRINT "NOT POSSIBLE -"; */
502 (void) puts("NOT POSSIBLE -");
509 /* 1040 REM *** CHECK FOR HAZARDS *** */
511 loc[YOU] = scratchloc;
513 if (scratchloc == loc[WUMPUS])
515 /* 1050 REM *** WUMPUS *** */
516 /* 1055 IF L<>L(2) THEN 1090 */
517 /* 1060 PRINT "... OOPS! BUMPED A WUMPUS!" */
518 /* 1065 REM *** MOVE WUMPUS *** */
520 /* 1075 IF F=0 THEN 1090 */
522 (void) puts("... OOPS! BUMPED A WUMPUS!");
526 /* Fall through since Wumpus could have been in a pit or bat room */
528 if (scratchloc == loc[PIT1] || scratchloc == loc[PIT2])
530 /* 1085 REM *** PIT *** */
531 /* 1090 IF L=L(3) THEN 1100 */
532 /* 1095 IF L<>L(4) THEN 1120 */
533 /* 1100 PRINT "YYYYIIIIEEEE . . . FELL IN PIT" */
536 (void) puts("YYYYIIIIEEEE . . . FELL IN PIT");
540 if (scratchloc == loc[BATS1] || scratchloc == loc[BATS2])
542 /* 1115 REM *** BATS *** */
543 /* 1120 IF L=L(5) THEN 1130 */
544 /* 1125 IF L<>L(6) THEN 1145 */
545 /* 1130 PRINT "ZAP--SUPER BAT SNATCH! ELSEWHEREVILLE FOR YOU!" */
550 (void) puts("ZAP--SUPER BAT SNATCH! ELSEWHEREVILLE FOR YOU!");
551 scratchloc = loc[YOU] = FNA();
562 if (argc >= 2 && strcmp(argv[1], "-s") == 0)
563 srand(atoi(argv[2]));
565 srand((int)time((long *) 0));
567 /* 15 PRINT "INSTRUCTIONS (Y-N)"; */
569 c = getlet("INSTRUCTIONS (Y-N)");
571 /* 25 IF I$="N" THEN 35 */
575 print_instructions();
577 /* 150 REM *** LOCATE L ARRAY ITEMS *** */
578 /* 155 REM *** 1-YOU, 2-WUMPUS, 3&4-PITS, 5&6-BATS *** */
582 /* 170 FOR J=1 TO 6 */
583 /* 175 L(J)=FNA(0) */
586 for (j = 0; j < LOCS; j++)
587 loc[j] = save[j] = FNA();
589 /* 190 REM *** CHECK FOR CROSSOVERS (IE L(1)=L(2), ETC) *** */
590 /* 195 FOR J=1 TO 6 */
591 /* 200 FOR K=1 TO 6 */
592 /* 205 IF J=K THEN 215 */
593 /* 210 IF L(J)=L(K) THEN 170 */
596 for (j = 0; j < LOCS; j++)
597 for (k = 0; k < LOCS; k++)
600 else if (loc[j] == loc[k])
603 /* 225 REM *** SET NO. OF ARROWS *** */
608 scratchloc = loc[YOU];
610 /* 240 REM *** RUN THE GAME *** */
611 /* 245 PRINT "HUNT THE WUMPUS" */
612 (void) puts("HUNT THE WUMPUS");
615 (void) printf("Wumpus is at %d, pits at %d & %d, bats at %d & %d\n",
617 loc[PIT1]+1, loc[PIT2]+1,
618 loc[BATS1]+1, loc[BATS2]+1);
622 /* 250 REM *** HAZARD WARNING AND LOCATION *** */
626 /* 260 REM *** MOVE OR SHOOT *** */
628 /* 270 ON O GOTO 280,300 */
631 /* 275 REM *** SHOOT *** */
635 /* 285 IF F=0 THEN 255 */
643 /* 295 REM *** MOVE *** */
647 /* 305 IF F=0 THEN 255 */
652 /* 310 IF F>0 THEN 335 */
653 if (finished == LOSE)
655 /* 315 REM *** LOSE *** */
656 /* 320 PRINT "HA HA HA - YOU LOSE!" */
658 (void) puts("HA HA HA - YOU LOSE!");
662 /* 330 REM *** WIN *** */
663 /* 335 PRINT "HEE HEE HEE - THE WUMPUS'LL GET YOU NEXT TIME!!" */
664 (void) puts("HEE HEE HEE - THE WUMPUS'LL GET YOU NEXT TIME!!");
667 /* 340 FOR J=1 TO 6 */
670 for (j = YOU; j < LOCS; j++)
673 /* 355 PRINT "SAME SETUP (Y-N)"; */
675 c = getlet("SAME SETUP (Y-N)");
677 /* 365 IF I$<>"Y"THEN 170 */
685 /* wumpus.c ends here */