===Maze.bas===

//This module is part of the original MMBasic library. It is reproduced here with kind permission of Hugh Buckle and Geoff Graham. Be aware it may reference functionality which has changed or is deprecated in the latest versions of MMBasic.//




<code>
100 PRINT:INPUT "MAZE - WHAT ARE YOUR WIDTH, LENGTH";H,V
102 IF H<>1 AND V<>1 THEN 110
104 PRINT "MEANINGLESS DIMENSIONS.  TRY AGAIN.":GOTO 100
110 DIM W(H,V),V(H,V)
120 PRINT
130 PRINT
140 PRINT
150 PRINT
160 Q=0:Z=0:X=INT(RND(1)*H+1)
165 FOR I=1 TO H
170 IF I=X THEN 173
171 PRINT "+--";:GOTO 180
173 PRINT "-  ";
180 NEXT I
190 PRINT "+"
195 C=1:W(X,1)=C:C=C+1
200 R=X:S=1:GOTO 260
210 IF R<>H THEN 240
215 IF S<>V THEN 230
220 R=1:S=1:GOTO 250
230 R=1:S=S+1:GOTO 250
240 R=R+1
250 IF W(R,S)=0 THEN 210
260 IF R-1=0 THEN 530
265 IF W(R-1,S)<>0 THEN 530
270 IF S-1=0 THEN 390
280 IF W(R,S-1)<>0 THEN 390
290 IF R=H THEN 330
300 IF W(R+1,S)<>0 THEN 330
310 X=INT(RND(1)*3+1)
320 ON X GOTO 790,820,860
330 IF S<>V THEN 340
334 IF Z=1 THEN 370
338 Q=1:GOTO 350
340 IF W(R,S+1)<>0 THEN 370
350 X=INT(RND(1)*3+1)
360 ON X GOTO 790,820,910
370 X=INT(RND(1)*2+1)
380 ON X GOTO 790,820
390 IF R=H THEN 470
400 IF W(R+1,S)<>0 THEN 470
405 IF S<>V THEN 420
410 IF Z=1 THEN 450
415 Q=1:GOTO 430
420 IF W(R,S+1)<>0 THEN 450
430 X=INT(RND(1)*3+1)
440 ON X GOTO 790,860,910
450 X=INT(RND(1)*2+1)
460 ON X GOTO 790,860
470 IF S<>V THEN 490
480 IF Z=1 THEN 520
485 Q=1:GOTO 500
490 IF W(R,S+1)<>0 THEN 520
500 X=INT(RND(1)*2+1)
510 ON X GOTO 790,910
520 GOTO 790
530 IF S-1=0 THEN 670
540 IF W(R,S-1)<>0 THEN 670
545 IF R=H THEN 610
547 IF W(R+1,S)<>0 THEN 610
550 IF S<>V THEN 560
552 IF Z=1 THEN 590
554 Q=1:GOTO 570
560 IF W(R,S+1)<>0 THEN 590
570 X=INT(RND(1)*3+1)
580 ON X GOTO 820,860,910
590 X=INT(RND(1)*2+1)
600 ON X GOTO 820,860
610 IF S<>V THEN 630
620 IF Z=1 THEN 660
625 Q=1:GOTO 640
630 IF W(R,S+1)<>0 THEN 660
640 X=INT(RND(1)*2+1)
650 ON X GOTO 820,910
660 GOTO 820
670 IF R=H THEN 740
680 IF W(R+1,S)<>0 THEN 740
685 IF S<>V THEN 700
690 IF Z=1 THEN 730
695 Q=1:GOTO 830
700 IF W(R,S+1)<>0 THEN 730
710 X=INT(RND(1)*2+1)
720 ON X GOTO 860,910
730 GOTO 860
740 IF S<>V THEN 760
750 IF Z=1 THEN 780
755 Q=1:GOTO 770
760 IF W(R,S+1)<>0 THEN 780
770 GOTO 910
780 GOTO 1000
790 W(R-1,S)=C
800 C=C+1:V(R-1,S)=2:R=R-1
810 IF C=H*V+1 THEN 1010
815 Q=0:GOTO 260
820 W(R,S-1)=C
830 C=C+1
840 V(R,S-1)=1:S=S-1:IF C=H*V+1 THEN 1010
850 Q=0:GOTO 260
860 W(R+1,S)=C
870 C=C+1:IF V(R,S)=0 THEN 880
875 V(R,S)=3:GOTO 890
880 V(R,S)=2
890 R=R+1
900 IF C=H*V+1 THEN 1010
905 GOTO 530
910 IF Q=1 THEN 960
920 W(R,S+1)=C:C=C+1:IF V(R,S)=0 THEN 940
930 V(R,S)=3:GOTO 950
940 V(R,S)=1
950 S=S+1:IF C=H*V+1 THEN 1010
955 GOTO 260
960 Z=1
970 IF V(R,S)=0 THEN 980
975 V(R,S)=3:Q=0:GOTO 1000
980 V(R,S)=1:Q=0:R=1:S=1:GOTO 250
1000 GOTO 210
1010 FOR J=1 TO V
1011 PRINT "|";
1012 FOR I=1 TO H
1013 IF V(I,J)<2 THEN 1030
1020 PRINT "   ";
1021 GOTO 1040
1030 PRINT "  |";
1040 NEXT I
1041 PRINT
1043 FOR I=1 TO H
1045 IF V(I,J)=0 THEN 1060
1050 IF V(I,J)=2 THEN 1060
1051 PRINT "+  ";
1052 GOTO 1070
1060 PRINT "+--";
1070 NEXT I
1071 PRINT "+"
1072 NEXT J
1073 RUN

</code>