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
36 #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] = {
74 {1, 4, 7}, {0, 2, 9}, {1, 3, 11}, {2, 4, 13}, {0, 3, 5},
75 {4, 6, 14}, {5, 7, 16}, {0, 6, 8}, {7, 9, 17}, {1, 8, 10},
76 {9, 11, 18}, {2, 10, 12}, {11, 13, 19}, {3, 12, 14}, {5, 13, 15},
77 {14, 16, 19}, {6, 15, 17}, {8, 16, 18}, {10, 17, 19}, {12, 15, 18},
80 /* 135 DEF FNA(X)=INT(20*RND(1))+1 */
81 #define FNA() (rand() % 20)
83 /* 140 DEF FNB(X)=INT(3*RND(1))+1 */
84 #define FNB() (rand() % 3)
86 /* 145 DEF FNC(X)=INT(4*RND(1))+1 */
87 #define FNC() (rand() % 4)
92 (void)printf("%s\n?", prompt);
93 if (fgets(inp, sizeof(inp), stdin))
104 (void)printf("%s\n?", prompt);
105 if (fgets(inp, sizeof(inp), stdin))
106 return (toupper(inp[0]));
113 void print_instructions() {
114 /* 375 REM *** INSTRUCTIONS *** */
115 /* 380 PRINT "WELCOME TO 'HUNT THE WUMPUS'" */
116 puts("WELCOME TO 'HUNT THE WUMPUS'");
117 /* 385 PRINT " THE WUMPUS LIVES IN A CAVE OF 20 ROOMS. EACH ROOM"
119 puts(" THE WUMPUS LIVES IN A CAVE OF 20 ROOMS. EACH ROOM");
120 /* 390 PRINT "HAS 3 TUNNELS LEADING TO OTHER ROOMS. (LOOK AT A"
122 puts("HAS 3 TUNNELS LEADING TO OTHER ROOMS. (LOOK AT A");
123 /* 395 PRINT "DODECAHEDRON TO SEE HOW THIS WORKS-IF YOU DON'T KNOW"
125 puts("DODECAHEDRON TO SEE HOW THIS WORKS-IF YOU DON'T KNOW");
126 /* 400 PRINT "WHAT A DODECAHEDRON IS, ASK SOMEONE)" */
127 puts("WHAT A DODECAHEDRON IS, ASK SOMEONE)");
130 /* 410 PRINT " HAZARDS:" */
132 /* 415 PRINT " BOTTOMLESS PITS - TWO ROOMS HAVE BOTTOMLESS PITS IN THEM
134 puts(" BOTTOMLESS PITS - TWO ROOMS HAVE BOTTOMLESS PITS IN THEM");
135 /* 420 PRINT " IF YOU GO THERE, YOU FALL INTO THE PIT (& LOSE!)"
137 puts(" IF YOU GO THERE, YOU FALL INTO THE PIT (& LOSE!)");
138 /* 425 PRINT " SUPER BATS - TWO OTHER ROOMS HAVE SUPER BATS. IF YOU"
140 puts(" SUPER BATS - TWO OTHER ROOMS HAVE SUPER BATS. IF YOU");
141 /* 430 PRINT " GO THERE, A BAT GRABS YOU AND TAKES YOU TO SOME
143 puts(" GO THERE, A BAT GRABS YOU AND TAKES YOU TO SOME OTHER");
144 /* 435 PRINT " ROOM AT RANDOM. (WHICH MAY BE TROUBLESOME)"
146 puts(" ROOM AT RANDOM. (WHICH MAY BE TROUBLESOME)");
147 /* 440 INPUT "TYPE AN E THEN RETURN ";W9 */
148 (void)getlet("TYPE AN E THEN RETURN ");
149 /* 445 PRINT " WUMPUS:" */
151 /* 450 PRINT " THE WUMPUS IS NOT BOTHERED BY HAZARDS (HE HAS SUCKER"
153 puts(" THE WUMPUS IS NOT BOTHERED BY HAZARDS (HE HAS SUCKER");
154 /* 455 PRINT " FEET AND IS TOO BIG FOR A BAT TO LIFT). USUALLY"
156 puts(" FEET AND IS TOO BIG FOR A BAT TO LIFT). USUALLY");
157 /* 460 PRINT " HE IS ASLEEP. TWO THINGS WAKE HIM UP: YOU SHOOTING AN"
159 puts(" HE IS ASLEEP. TWO THINGS WAKE HIM UP: YOU SHOOTING AN");
160 /* 465 PRINT "ARROW OR YOU ENTERING HIS ROOM." */
161 puts("ARROW OR YOU ENTERING HIS ROOM.");
162 /* 470 PRINT " IF THE WUMPUS WAKES HE MOVES (P=.75) ONE ROOM"
164 puts(" IF THE WUMPUS WAKES HE MOVES (P=.75) ONE ROOM");
165 /* 475 PRINT " OR STAYS STILL (P=.25). AFTER THAT, IF HE IS WHERE YOU"
167 puts(" OR STAYS STILL (P=.25). AFTER THAT, IF HE IS WHERE YOU");
168 /* 480 PRINT " ARE, HE EATS YOU UP AND YOU LOSE!" */
169 puts(" ARE, HE EATS YOU UP AND YOU LOSE!");
172 /* 490 PRINT " YOU:" */
174 /* 495 PRINT " EACH TURN YOU MAY MOVE OR SHOOT A CROOKED ARROW"
176 puts(" EACH TURN YOU MAY MOVE OR SHOOT A CROOKED ARROW");
177 /* 500 PRINT " MOVING: YOU CAN MOVE ONE ROOM (THRU ONE TUNNEL)"
179 puts(" MOVING: YOU CAN MOVE ONE ROOM (THRU ONE TUNNEL)");
180 /* 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
185 puts(" EACH ARROW CAN GO FROM 1 TO 5 ROOMS. YOU AIM BY TELLING");
186 /* 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
191 puts(" IF THE ARROW CAN'T GO THAT WAY (IF NO TUNNEL) IT MOVES");
192 /* 525 PRINT " AT RANDOM TO THE NEXT ROOM." */
193 puts(" AT RANDOM TO THE NEXT ROOM.");
194 /* 530 PRINT " IF THE ARROW HITS THE WUMPUS, YOU WIN."
196 puts(" IF THE ARROW HITS THE WUMPUS, YOU WIN.");
197 /* 535 PRINT " IF THE ARROW HITS YOU, YOU LOSE." */
198 puts(" IF THE ARROW HITS YOU, YOU LOSE.");
199 /* 540 INPUT "TYPE AN E THEN RETURN ";W9 */
200 (void)getlet("TYPE AN E THEN RETURN ");
201 /* 545 PRINT " WARNINGS:" */
203 /* 550 PRINT " WHEN YOU ARE ONE ROOM AWAY FROM A WUMPUS OR HAZARD,"
205 puts(" WHEN YOU ARE ONE ROOM AWAY FROM A WUMPUS OR HAZARD,");
206 /* 555 PRINT " THE COMPUTER SAYS:" */
207 puts(" THE COMPUTER SAYS:");
208 /* 560 PRINT " WUMPUS: 'I SMELL A WUMPUS'" */
209 puts(" WUMPUS: 'I SMELL A WUMPUS'");
210 /* 565 PRINT " BAT : 'BATS NEARBY'" */
211 puts(" BAT : 'BATS NEARBY'");
212 /* 570 PRINT " PIT : 'I FEEL A DRAFT'" */
213 puts(" PIT : 'I FEEL A DRAFT'");
219 void check_hazards() {
220 /* 585 REM *** PRINT LOCATION & HAZARD WARNINGS *** */
224 /* 595 FOR J=2 TO 6 */
225 /* 600 FOR K=1 TO 3 */
226 /* 605 IF S(L(1),K)<>L(J) THEN 640 */
227 /* 610 ON J-1 GOTO 615,625,625,635,635 */
228 /* 615 PRINT "I SMELL A WUMPUS!" */
230 /* 625 PRINT "I FEEL A DRAFT" */
232 /* 635 PRINT "BATS NEARBY!" */
235 for (j = WUMPUS; j < LOCS; j++) {
236 for (k = 0; k < 3; k++) {
237 if (cave[loc[YOU]][k] != loc[j]) {
242 (void)puts("I SMELL A WUMPUS!");
243 } else if (j == PIT1 || j == PIT2) {
244 (void)puts("I FEEL A DRAFT");
245 } else if (j == BATS1 || j == BATS2) {
246 (void)puts("BATS NEARBY!");
251 /* 650 PRINT "YOU ARE IN ROOM "L(1) */
252 (void)printf("YOU ARE IN ROOM %d\n", loc[YOU] + 1);
254 /* 655 PRINT "TUNNELS LEAD TO "S(L,1);S(L,2);S(L,3) */
255 (void)printf("TUNNELS LEAD TO %d %d %d\n", cave[loc[YOU]][0] + 1,
256 cave[loc[YOU]][1] + 1, cave[loc[YOU]][2] + 1);
264 int move_or_shoot() {
267 /* 670 REM *** CHOOSE OPTION *** */
270 /* 675 PRINT "SHOOT OR MOVE (S-M)"; */
272 c = getlet("SHOOT OR MOVE (S-M)");
274 /* 685 IF I$<>"S" THEN 700 */
277 /* 700 IF I$<>"M" THEN 675 */
282 } else if (c == 'M') {
290 extern void check_shot(), move_wumpus();
293 /* 715 REM *** ARROW ROUTINE *** */
297 /* 725 REM *** PATH OF ARROW *** */
299 /* 735 PRINT "NO. OF ROOMS (1-5)"; */
301 j9 = getnum("NO. OF ROOMS (1-5)");
303 /* 745 IF J9<1 THEN 735 */
304 /* 750 IF J9>5 THEN 735 */
305 if (j9 < 1 || j9 > 5) {
309 /* 755 FOR K=1 TO J9 */
310 for (k = 0; k < j9; k++) {
311 /* 760 PRINT "ROOM #"; */
313 path[k] = getnum("ROOM #") - 1;
315 /* 770 IF K<=2 THEN 790 */
320 /* 775 IF P(K)<>P(K-2) THEN 790 */
321 if (path[k] != path[k - 2]) {
325 /* 780 PRINT "ARROWS AREN'T THAT CROOKED - TRY ANOTHER ROOM"
327 (void)puts("ARROWS AREN'T THAT CROOKED - TRY ANOTHER ROOM");
334 /* 795 REM *** SHOOT ARROW *** */
336 scratchloc = loc[YOU];
338 /* 805 FOR K=1 TO J9 */
339 for (k = 0; k < j9; k++) {
343 (void)printf("Location is %d, looking for tunnel to room %d\n",
344 scratchloc + 1, path[k] + 1);
347 /* 810 FOR K1=1 TO 3 */
348 for (k1 = 0; k1 < 3; k1++) {
349 /* 815 IF S(L,K1)=P(K) THEN 895 */
350 if (cave[scratchloc][k1] == path[k]) {
352 * This is the only bit of the translation I'm
353 * not sure about. It requires the trajectory
354 * of the arrow to be a path. Without it, all
355 * rooms on the trajectory would be required by
356 * the above to be adjacent to the player,
357 * making for a trivial game --- just move to
358 * where you smell a wumpus and shoot into all
359 * adjacent passages! However, I can't find an
360 * equivalent in the BASIC.
362 scratchloc = path[k];
365 (void)printf("Found tunnel to room %d\n",
369 /* this simulates logic at 895 in the BASIC code
372 if (finished != NOT) {
380 /* 825 REM *** NO TUNNEL FOR ARROW *** */
381 /* 830 L=S(L,FNB(1)) */
382 scratchloc = cave[scratchloc][FNB()];
385 (void)printf("No tunnel for room %d, new location is %d\n",
386 path[k] + 1, scratchloc + 1);
391 if (finished != NOT) {
399 if (finished == NOT) {
400 /* 845 PRINT "MISSED" */
401 (void)puts("MISSED");
404 scratchloc = loc[YOU];
406 /* 855 REM *** MOVE WUMPUS *** */
410 /* 865 REM *** AMMO CHECK *** */
412 /* 875 IF A>0 THEN 885 */
423 /* 890 REM *** SEE IF ARROW IS AT L(1) OR AT L(2) */
426 /* 900 IF L<>L(2) THEN 920 */
427 /* 905 PRINT "AHA! YOU GOT THE WUMPUS!" */
430 if (scratchloc == loc[WUMPUS]) {
431 (void)puts("AHA! YOU GOT THE WUMPUS!");
435 /* 920 IF L<>L(1) THEN 840 */
436 /* 925 PRINT "OUCH! ARROW GOT YOU!" */
438 else if (scratchloc == loc[YOU]) {
439 (void)puts("OUCH! ARROW GOT YOU!");
445 /* 935 REM *** MOVE WUMPUS ROUTINE *** */
449 /* 945 IF K=4 THEN 955 */
450 /* 950 L(2)=S(L(2),K) */
452 loc[WUMPUS] = cave[loc[WUMPUS]][k];
456 (void)printf("Wumpus location is now room %d\n", loc[WUMPUS] + 1);
459 /* 955 IF L(2)<>L THEN 970 */
460 if (loc[WUMPUS] != loc[YOU]) {
464 /* 960 PRINT "TSK TSK TSK - WUMPUS GOT YOU!" */
465 (void)puts("TSK TSK TSK - WUMPUS GOT YOU!");
474 /* 975 REM *** MOVE ROUTINE *** */
479 /* 985 PRINT "WHERE TO"; */
481 scratchloc = getnum("WHERE TO");
483 /* 995 IF L<1 THEN 985 */
484 /* 1000 IF L>20 THEN 985 */
485 if (scratchloc < 1 || scratchloc > 20) {
490 /* 1005 FOR K=1 TO 3 */
491 for (k = 0; k < 3; k++) {
492 /* 1010 REM *** CHECK IF LEGAL MOVE *** */
493 /* 1015 IF S(L(1),K)=L THEN 1045 */
494 if (cave[loc[YOU]][k] == scratchloc) {
501 /* 1025 IF L=L(1) THEN 1045 */
502 if (scratchloc != loc[YOU]) {
503 /* 1030 PRINT "NOT POSSIBLE -"; */
504 (void)puts("NOT POSSIBLE -");
511 /* 1040 REM *** CHECK FOR HAZARDS *** */
513 loc[YOU] = scratchloc;
515 if (scratchloc == loc[WUMPUS]) {
516 /* 1050 REM *** WUMPUS *** */
517 /* 1055 IF L<>L(2) THEN 1090 */
518 /* 1060 PRINT "... OOPS! BUMPED A WUMPUS!" */
519 /* 1065 REM *** MOVE WUMPUS *** */
521 /* 1075 IF F=0 THEN 1090 */
523 (void)puts("... OOPS! BUMPED A WUMPUS!");
528 /* Fall through since Wumpus could have been in a pit or bat
531 if (scratchloc == loc[PIT1] || scratchloc == loc[PIT2]) {
532 /* 1085 REM *** PIT *** */
533 /* 1090 IF L=L(3) THEN 1100 */
534 /* 1095 IF L<>L(4) THEN 1120 */
535 /* 1100 PRINT "YYYYIIIIEEEE . . . FELL IN PIT" */
538 (void)puts("YYYYIIIIEEEE . . . FELL IN PIT");
542 if (scratchloc == loc[BATS1] || scratchloc == loc[BATS2]) {
543 /* 1115 REM *** BATS *** */
544 /* 1120 IF L=L(5) THEN 1130 */
545 /* 1125 IF L<>L(6) THEN 1145 */
546 /* 1130 PRINT "ZAP--SUPER BAT SNATCH! ELSEWHEREVILLE FOR YOU!"
552 (void)puts("ZAP--SUPER BAT SNATCH! ELSEWHEREVILLE FOR YOU!");
553 scratchloc = loc[YOU] = FNA();
564 if (argc >= 2 && strcmp(argv[1], "-s") == 0) {
565 srand(atoi(argv[2]));
567 srand((int)time((long *)0));
570 /* 15 PRINT "INSTRUCTIONS (Y-N)"; */
572 c = getlet("INSTRUCTIONS (Y-N)");
574 /* 25 IF I$="N" THEN 35 */
578 print_instructions();
580 /* 150 REM *** LOCATE L ARRAY ITEMS *** */
581 /* 155 REM *** 1-YOU, 2-WUMPUS, 3&4-PITS, 5&6-BATS *** */
585 /* 170 FOR J=1 TO 6 */
586 /* 175 L(J)=FNA(0) */
589 for (j = 0; j < LOCS; j++) {
590 loc[j] = save[j] = FNA();
593 /* 190 REM *** CHECK FOR CROSSOVERS (IE L(1)=L(2), ETC) ***
595 /* 195 FOR J=1 TO 6 */
596 /* 200 FOR K=1 TO 6 */
597 /* 205 IF J=K THEN 215 */
598 /* 210 IF L(J)=L(K) THEN 170 */
601 for (j = 0; j < LOCS; j++) {
602 for (k = 0; k < LOCS; k++) {
605 } else if (loc[j] == loc[k]) {
611 /* 225 REM *** SET NO. OF ARROWS *** */
616 scratchloc = loc[YOU];
618 /* 240 REM *** RUN THE GAME *** */
619 /* 245 PRINT "HUNT THE WUMPUS" */
620 (void)puts("HUNT THE WUMPUS");
623 (void)printf("Wumpus is at %d, pits at %d & %d, bats at %d & %d\n",
624 loc[WUMPUS] + 1, loc[PIT1] + 1, loc[PIT2] + 1,
625 loc[BATS1] + 1, loc[BATS2] + 1);
629 /* 250 REM *** HAZARD WARNING AND LOCATION *** */
633 /* 260 REM *** MOVE OR SHOOT *** */
635 /* 270 ON O GOTO 280,300 */
636 if (move_or_shoot()) {
637 /* 275 REM *** SHOOT *** */
641 /* 285 IF F=0 THEN 255 */
642 if (finished == NOT) {
648 /* 295 REM *** MOVE *** */
652 /* 305 IF F=0 THEN 255 */
653 if (finished == NOT) {
658 /* 310 IF F>0 THEN 335 */
659 if (finished == LOSE) {
660 /* 315 REM *** LOSE *** */
661 /* 320 PRINT "HA HA HA - YOU LOSE!" */
663 (void)puts("HA HA HA - YOU LOSE!");
665 /* 330 REM *** WIN *** */
666 /* 335 PRINT "HEE HEE HEE - THE WUMPUS'LL GET YOU NEXT TIME!!"
668 (void)puts("HEE HEE HEE - THE WUMPUS'LL GET YOU NEXT TIME!!");
671 /* 340 FOR J=1 TO 6 */
674 for (j = YOU; j < LOCS; j++) {
678 /* 355 PRINT "SAME SETUP (Y-N)"; */
680 c = getlet("SAME SETUP (Y-N)");
682 /* 365 IF I$<>"Y"THEN 170 */
691 /* wumpus.c ends here */