Maze (Amazing)

The maze program generates a maze with one path through it. It is originally from BASIC Computer Programs, and has been modified to show the graphics features of the Thomson MO5 home computer as well as printer output.

3 SCREEN 4,2
5 CLS
10 PRINT TAB(12);"AMAZING PROGRAM"
20 PRINT TAB(10);"CREATIVE COMPUTING,"
30 PRINT TAB(9);"MORRISTOWN, NEW JERSEY"
40 PRINT:PRINT
50 PRINT "PRESS ANY KEY TO CONTINUE"
60 X=RND(1):IF INKEY$="" THEN 60
70 REM -- CONSTANTS
80 NOFLOOR% = 1
90 NORIGHTWALL% = 2

100 INPUT "WHAT ARE YOUR WIDTH AND LENGTH";COLS%,ROWS%
102 IF COLS% <= 1 OR ROWS% <= 1 THEN PRINT "MEANINGLESS DIMENISION. TRY AGAIN":GOTO 100
103 INPUT "TEXT OR GRAPHICAL OUTPUT (T/G)";TYPE$
104 IF TYPE$<>"T" AND TYPE$<>"G" THEN PRINT "ENTER 'T' OR 'G'":GOTO 103
105 IF TYPE$ = "T" THEN TT%=1 ELSE TT%=2

110 IF TT%=2 THEN 140
120 INPUT "OUTPUT TO SCREEN OR PRINTER (S/P)";DEVICE$
130 IF DEVICE$<>"S" AND DEVICE$<>"P" THEN PRINT "ENTER 'S' OR 'P'":GOTO 120
135 IF DEVICE$="S" THEN DEVICE$="SCRN:" ELSE DEVICE$="LPRT:(80)"
140 DIM VISITED%(COLS%,ROWS%),CELLS%(COLS%,ROWS%)
150 PRINT:PRINT:PRINT:PRINT
155 NUMCELLS% = COLS% * ROWS%
160 Q%=0:Z%=0:ENTRY%=INT(RND(1)*COLS%+1)
195 CELLINX%=1:VISITED%(ENTRY%,1)=CELLINX%:CELLINX% = CELLINX% + 1
200 C%=ENTRY%:R%=1:GOTO 260

210 IF C%<>COLS% THEN 240
215 IF R%<>ROWS% THEN 230
220 C%=1:R%=1:GOTO 250
230 C%=1:R%=R%+1:GOTO 250
240 C%=C%+1
250 IF VISITED%(C%,R%)=0 THEN 210
260 IF C%=1 THEN 530
265 IF VISITED%(C%-1,R%)<>0 THEN 530
270 IF R%-1=0 THEN 390
280 IF VISITED%(C%,R%-1)<>0 THEN 390
290 IF C%=COLS% THEN 330
300 IF VISITED%(C%+1,R%)<>0 THEN 330
310 X%=INT(RND(1)*3+1)
320 ON X% GOTO 790,820,860
330 IF R%<>ROWS% THEN 340
334 IF Z%=1 THEN 370
338 Q%=1:GOTO 350
340 IF VISITED%(C%,R%+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 C%=COLS% THEN 470
400 IF VISITED%(C%+1,R%)<>0 THEN 470
405 IF R%<>ROWS% THEN 420
410 IF Z%=1 THEN 450
415 Q%=1:GOTO 430
420 IF VISITED%(C%,R%+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 R%<>ROWS% THEN 490
480 IF Z%=1 THEN 520
485 Q%=1:GOTO 500
490 IF VISITED%(C%,R%+1)<>0 THEN 520
500 X%=INT(RND(1)*2+1)
510 ON X% GOTO 790,910
520 GOTO 790
530 IF R%-1=0 THEN 670
540 IF VISITED%(C%,R%-1)<>0 THEN 670
545 IF C%=COLS% THEN 610
547 IF VISITED%(C%+1,R%)<>0 THEN 610
550 IF R%<>ROWS% THEN 560
552 IF Z%=1 THEN 590
554 Q%=1:GOTO 570
560 IF VISITED%(C%,R%+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 R%<>ROWS% THEN 630
620 IF Z%=1 THEN 660
625 Q%=1:GOTO 640
630 IF VISITED%(C%,R%+1)<>0 THEN 660
640 X%=INT(RND(1)*2+1)
650 ON X% GOTO 820,910
660 GOTO 820
670 IF C%=COLS% THEN 740
680 IF VISITED%(C%+1,R%)<>0 THEN 740
685 IF R%<>ROWS% THEN 700
690 IF Z%=1 THEN 730
695 Q%=1:GOTO 830
700 IF VISITED%(C%,R%+1)<>0 THEN 730
710 X%=INT(RND(1)*2+1)
720 ON X% GOTO 860,910
730 GOTO 860
740 IF R%<>ROWS% THEN 760
750 IF Z%=1 THEN 780
755 Q%=1:GOTO 770
760 IF VISITED%(C%,R%+1)<>0 THEN 780
770 GOTO 910
780 GOTO 1000
790 VISITED%(C%-1,R%)=CELLINX%
800 CELLINX% = CELLINX% + 1:CELLS%(C%-1,R%) = NORIGHTWALL%:C%=C%-1
810 IF CELLINX% > NUMCELLS% THEN 1500
815 Q%=0:GOTO 260
820 VISITED%(C%,R%-1)=CELLINX%
830 CELLINX% = CELLINX% + 1
840 CELLS%(C%,R%-1) = NOFLOOR%:R%=R%-1:IF CELLINX% > NUMCELLS% THEN 1500
850 Q%=0:GOTO 260
860 VISITED%(C%+1,R%)=CELLINX%
870 CELLINX% = CELLINX% + 1
880 CELLS%(C%,R%) = CELLS%(C%,R%) OR NORIGHTWALL%
890 C%=C%+1
900 IF CELLINX% > NUMCELLS% THEN 1500
905 GOTO 530
910 IF Q%=1 THEN 960
920 VISITED%(C%,R%+1)=CELLINX%:CELLINX% = CELLINX% + 1
930 CELLS%(C%,R%) = CELLS%(C%,R%) OR NOFLOOR%
950 R%=R%+1:IF CELLINX% > NUMCELLS% THEN 1500
955 GOTO 260
960 Z%=1
970 Q%=0
980 CELLS%(C%,R%) = CELLS%(C%,R%) OR NOFLOOR%:Q%=0
990 IF (CELLS%(C%,R%) AND NORIGHTWALL%) = 0 THEN C%=1:R%=1:GOTO 250
1000 GOTO 210

1500 ON TT% GOSUB 2000,3000
1510 END

2000 REM -- PRINT MAZE
2010 OPEN "O",#1,DEVICE$
2020 FOR C%=1 TO COLS%
2030 IF C%=ENTRY% THEN PRINT #1, ".  "; ELSE PRINT #1, ".--";
2040 NEXT C%
2050 PRINT #1, "."
2060 FOR R%=1 TO ROWS%
2070 PRINT #1, "I";
2080 FOR C%=1 TO COLS%
2090 IF (CELLS%(C%,R%) AND NORIGHTWALL%) = 0 THEN PRINT #1, "  I"; ELSE PRINT #1, "   ";
2100 NEXT C%
2110 PRINT #1
2120 FOR C%=1 TO COLS%
2130 IF (CELLS%(C%,R%) AND NOFLOOR%) = 0 THEN PRINT #1, ":--"; ELSE PRINT #1, ":  ";
2140 NEXT C%
2150 PRINT #1, ":"
2160 NEXT R%
2170 CLOSE 1
2180 RETURN

3000 REM -- DRAW MAZE
3010 VO%=20
3020 SIZE%=10
3040 CLS
3050 FOR C%=1 TO COLS%
3060 IF C% <> ENTRY% THEN LINE (C%*SIZE%, VO%)-(C%*SIZE%+SIZE%, VO%),4
3070 NEXT C%
3080 FOR R%=1 TO ROWS%
3090 LINE (SIZE%, R%*SIZE%-SIZE%+VO%)-(SIZE%,R%*SIZE%+VO%),4
3100 FOR C%=1 TO COLS%
3110 IF (CELLS%(C%,R%) AND NORIGHTWALL%) = 0 THEN LINE (C%*SIZE%+SIZE%, R%*SIZE%-SIZE%+VO%)-(C%*SIZE%+SIZE%, R%*SIZE%+VO%),4
3120 IF (CELLS%(C%,R%) AND NOFLOOR%) = 0 THEN LINE (C%*SIZE%, R%*SIZE%+VO%)-(C%*SIZE%+SIZE%,R%*SIZE%+VO%),4
3130 NEXT C%
3140 NEXT R%
3150 RETURN