Basic source - Adventure type game

[Blacklord]

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10 REM ADVENTURE SHELL
20 REM **********************************
30 REM by Tim Hartnell
40 REM       Interface publications          
50 REM **********************************
60 GOSUB 3950:REM INITIALISE
70 REM **********************************
80 REM REPORT TO PLAYER
90 FOR Z=1 TO 1000:NEXT Z
110 IF RO=16 THEN QU=1:GOTO 2950
120 REM *********************************
130 GOSUB 3060:REM ** ROOM DESCRIPTIONS **
140 REM ** NEXT LINE ACTIVATED IF OBJECT IN ROOM **
150 IF (A(RO,5)<>0) OR (A(RO,6)<>0) OR (A(RO,7)<>0) THEN GOSUB 3850:REM OBJECTS
160 IF A(RO,8)=0 THEN 210:REM ** NO MONSTER IN ROOM **
170 PRINT TAB(3);"LOOK OUT!":PRINT "THERE IS AN ";M$(A(RO,8));" HERE!"
180 IF RND(1)>.7 THEN PRINT "THE ";M$(A(RO,8));" ATTACKS!":KW=1:GOSUB 1670:GOTO 80
190 REM *************************************
200 REM ** NEXT LINES DECREMENT ATTRIBUTES **
210 IF RND(1)>.94 THEN ST=ST-1:IF ST<0 THEN ST=0
220 IF RND(1)>.94 THEN CH=CH-1:IF CH<0 THEN CH=0
230 IF RND(1)>.94 THEN DE=DE-1:IF DE<0 THEN DE=0
240 IF RND(1)>.94 THEN IT=IT-1:IF IT<0 THEN IT=0
250 IF RND(1)>.94 THEN WI=WI-1:IF WI<0 THEN WI=0
260 IF RND(1)>.94 THEN CO=CO-1:IF CO<0 THEN CO=0
270 REM ** NEXT LINES REPORT ATTRIBUTES TO PLAYER **
280 PRINT:PRINT"Your attributes are:"
290 PRINT TAB(4);"Strength -";ST;"   Charisma -";CH
300 PRINT TAB(4);"Dexterity -";DE;"  Intelligence -";IT
310 PRINT TAB(4);"Wisdom -";WI;"     Constitution -";CO
320 REM ** NEXT LINE CHECKS IF ANY ATTRIBUTE IS ZERO **
330 IF ST*CH*DE*CO*IT*WI<>0 THEN 380
340 PRINT:PRINT "Unfortunately you are exhausted..."
350 PRINT "So this adventure must end":QU=2:GOTO 2990
360 REM *************************************
370 REM ** NEXT LINES CHECK TO SEE IF PLAYER IS CARRYING ANYTHING **
380 FLAG=0
390 FOR J=1 TO 5
400 IF P(J)<>0 THEN FLAG=1
410 NEXT J
420 IF FLAG=0 THEN 490
430 CASH=0
440 PRINT:PRINT "You are carrying:"
450 FOR J=1 TO 5
460 IF P(J)<>0 THEN PRINT TAB(4);O$(P(J)):CASH=CASH+V(P(J))
470 NEXT J
480 IF CASH>0 THEN PRINT TAB(8);"Total value - $";STR$(CASH)
490 PRINT
500 REM ************************************
510 REM ** NEXT LINES ACCEPT PLAYER INPUT **
520 KW=0:REM ** KW STANDS FOR KEYWORD - EQUALS 1 IF UNDERSTOOD **
530 FOR Z=1 TO 1000:NEXT Z
540 INPUT"What do you want to do",A$
550 REM ** NEXT LINES ADD SPACES IF LESS THAN 7 LONG **
560 IF A$="" THEN 540
570 AS=ASC(A$)
580 M=LEN(A$):IF M<7 THEN A$=A$+" ":GOTO 580
590 REM *************************************
600 REM ** GET FIRST THREE CHARACTERS - CHECK IF HELP OR QUIT
610 B$=LEFT$(A$,3)
620 IF B$="HEL" THEN PRINT TAB(3);"You must be joking!":GOTO 1050
630 IF B$="QUI" THEN QU=4:GOTO 2890
640 REM *********************************                                      
650 REM ** NOW BREAK DOWN PLAYER INPUT **
660 N=1
670 IF MID$(A$,N,1)<>" " THEN 700
680 C$=MID$(A$,N+1,3):IF LEFT$(C$,1)<>" " THEN 770
690 IF LEFT$(C$,1)=" " THEN 730
700 IF N710 REM ***********************************
720 REM ** GETS HERE IF ONLY ONE WORD ENTERED BY PLAYER, CHOOSE REPLY **
730 IF RND(1)>.5 THEN 750
740 PRINT TAB(6);"By itself, ";A$:PRINT TAB(6);"Can't be acted upon":GOTO 540
750 PRINT A$;" is just one word":PRINT TAB(4);" I need two":GOTO 540
760 REM *************************************
770 REM ** NEXT LINES 'UNDERSTAND' INPUT
780 REM ** NEXT LINE ACCEPTS 'KILL' OR 'FIGHT'
790 IF (B$="KIL") OR (B$="FIG") THEN KW=1:GOSUB 1670
820 REM ** NEXT LINE ACCEPTS 'RUN' 'GO' OR 'MOV'
830 IF (B$="GO ") OR (B$="MOV") OR (B$="RUN") THEN KW=1:GOSUB 1080
840 REM ** NEXT LINE ACCEPTS 'GET' 'TAKE' OR 'LIFT'
850 IF (B$="GET") OR (B$="TAK") OR (B$="LIF") THEN KW=1:GOSUB 1200
860 REM ** NEXT LINE ACCEPTS 'DROP' 'PUT' OR 'LEAVE'
870 IF (B$="DRO") OR (B$="PUT") OR (B$="LEA") THEN KW=1:GOSUB 1440
880 REM ** USE THIS SPACE TO ENTER OWN COMMANDS GOSUBBING THE GIVEN NUMBERS
890 REM e.g. IF (B$="LOO") OR (B$="SEE") THEN GOSUB 2700
900 REM
910 REM 2730
920 REM
930 REM 2770
940 REM
950 REM 2810
960 REM
970 REM 2850
980 IF KW=1 THEN 1050
990 REM **********************************
1000 REM ** CHOOSE I DON'T UNDERSTAND MESSAGE
1010 R=INT(RND(1)*3)
1020 IF R=0 THEN PRINT "It would not be wise to ";A$
1030 IF R=1 THEN PRINT "Only a fool would try to ";A$
1040 IF R=2 THEN PRINT "I don't understand ";A$
1050 FOR Z=1 TO 500:NEXT Z
1060 GOTO 80
1070 REM ************************************
1080 REM ** MOVEMENT
1090 C$=LEFT$(C$,1)
1100 IF (C$="N") AND (A(RO,1)=0) THEN PRINT "You can not go that way":RETURN
1110 IF (C$="S") AND (A(RO,2)=0) THEN PRINT "There is no exit south":RETURN
1120 IF (C$="E") AND (A(RO,3)=0) THEN PRINT "I see nowhere east to go":RETURN
1130 IF (C$="W") AND (A(RO,4)=0) THEN PRINT "You can't walk through walls":RETURN
1140 IF C$="N" THEN RO=A(RO,1)
1150 IF C$="S" THEN RO=A(RO,2)
1160 IF C$="E" THEN RO=A(RO,3)
1170 IF C$="W" THEN RO=A(RO,4)
1180 RETURN
1190 REM *******************
1200 REM ** GET OBJECTS ROUTINE
1210 FLAG=0
1220 FOR J=1 TO 5
1230 IF P(J)<>0 THEN FLAG=FLAG+1
1240 NEXT J
1250 IF FLAG=5 THEN PRINT "You are already carrying five objects":RETURN
1260 REM ** CHECK IF ANYTHING IN ROOM TO BE PICKED UP
1270 IF (A(RO,5)<>0) OR (A(RO,6)<>0) OR (A(RO,7)<>0) THEN 1310
1280 PRINT "I see nothing to pick up":RETURN
1290 REM *************************************
1300 REM ** NOW PICK IT UP
1310 D$="":E$="":F$=""
1320 D$=LEFT$(O$(A(RO,5)),3)
1330 E$=LEFT$(O$(A(RO,6)),3)
1340 F$=LEFT$(O$(A(RO,7)),3)
1350 IF C$=D$ THEN N=A(RO,5):A(RO,5)=0:GOTO 1380
1360 IF C$=E$ THEN N=A(RO,6):A(RO,6)=0:GOTO 1380
1370 IF C$=F$ THEN N=A(RO,7):A(RO,7)=0
1380 J=1
1390 IF P(J)=0 THEN P(J)=N:GOTO 1410
1400 IF J<5 THEN J=J+1:GOTO 1390
1410 PRINT TAB(3);">-> YOU NOW HAVE THE ";O$(N)
1420 RETURN
1430 REM *************************************
1440 REM ** DROP ROUTINE
1450 FLAG=0
1460 FOR J=1 TO 5
1470 IF P(J)<>0 THEN FLAG=1
1480 NEXT J
1490 IF FLAG=0 THEN PRINT "You are not carrying anything":RETURN
1500 IF (A(RO,5)=0) OR (A(RO,6)=0) OR (A(RO,7)=0) THEN 1520
1510 PRINT "This room already holds it's maximum number of objects":RETURN
1520 D$="":D=0
1530 FOR J=1 TO 8
1540 IF LEFT$(O$(J),3)=C$ THEN D$=O$(J):D=J
1550 NEXT J
1560 IF D$<>"" THEN 1580
1570 PRINT "How can you when you're not holding it":RETURN
1580 FOR J=1 TO 5
1590 IF P(J)=D THEN P(J)=0
1600 NEXT J
1610 IF A(RO,5)=0 THEN A(RO,5)=D:GOTO 1640
1620 IF A(RO,6)=0 THEN A(RO,6)=D:GOTO 1640
1630 IF A(RO,7)=0 THEN A(RO,7)=D
1640 PRINT "You have dropped the ";D$
1650 RETURN
1660 REM *************
1670 REM ** FIGHT ROUTINE
1680 REM ** NEXT LINES CHECK IF MONSTER IS PRESENT TO FIGHT
1690 IF A(RO,8)<>0 THEN 1750
1700 R=RND(1)
1710 IF R<.5 THEN PRINT "There is nothing to fight here"
1720 IF R>=.5 THEN PRINT "You can't fight empty air"
1730 RETURN
1740 REM ** SET G$ EQUAL TO NAME OF MONSTER/CREATE ITS ATTRIBUTES
1750 G$=M$(A(RO,8))
1760 S1=INT(RND(1)*6+RND(1)*6+RND(1)*6)+3
1770 H1=INT(RND(1)*6+RND(1)*6+RND(1)*6)+3
1780 D1=INT(RND(1)*6+RND(1)*6+RND(1)*6)+3
1790 I1=INT(RND(1)*6+RND(1)*6+RND(1)*6)+3
1800 W1=INT(RND(1)*6+RND(1)*6+RND(1)*6)+3
1810 C1=INT(RND(1)*6+RND(1)*6+RND(1)*6)+3
1820 PRINT "---------------------------------------"
1830 PRINT "YOUR OPPONENT IS AN ";G$
1840 MT=0:HT=0:REM ** MONSTER TALLY, HUMAN TALLY
1850 FF=S1*(INT(RND(1)*6)+1)
1860 PRINT "---------------------------------------"
1870 PRINT "THE ";G$;"'S DANGER LEVEL IS ";FF
1880 PRINT "---------------------------------------"
1890 FOR Z=1 TO 1500:NEXT Z
1900 REM ** CHECK IF CARRYING WEAPONS
1910 FOR J=1 TO 5
1920 T(J)=0
1930 IF P(J)=6 THEN PRINT "Your axe might be handy":T(J)=6
1940 IF P(J)=5 THEN PRINT "Your sword may stand you in good stead":T(J)=5
1950 NEXT J
1960 FLAG=0
1970 FOR J=1 TO 5
1980 IF T(J)<>0 THEN FLAG=FLAG+1
1990 NEXT J
2000 IF FLAG<>0 THEN 2020
2010 PRINT "You must fight the ";G$;" with your bare hands":GOTO 2170
2020 IF FLAG>1 THEN 2090
2030 FOR J=1 TO 5
2040 IF T(J)<>0 THEN FLAG=T(J)
2050 NEXT J
2060 PRINT "You must fight with your ";O$(FLAG)
2070 FF=INT(FF*2/FLAG)
2080 GOTO 2170
2090 PRINT "Choose your weapon:"
2100 FOR J=1 TO 5
2110 IF P(J)<>0 THEN PRINT J;" - ";O$(P(J))
2120 NEXT J
2130 INPUT "Enter the number you choose",J
2140 IF P(J)=0 THEN PRINT "You do not have the ";O$(J):GOTO 2130
2150 PRINT "Right, so you choose to fight with the ";O$(P(J))
2160 FF=INT(FF*2/J)
2170 FOR Z=1 TO 1500:NEXT Z
2180 PRINT "========================================"
2190 PRINT "THE ";G$;" HAS THE FOLLOWING ATTRIBUTES:"
2200 PRINT "1 - Strength     ",S1,"2 - Charisma     ",H1
2210 PRINT "3 - Dexterity    ",D1,"4 - Intelligence ",I1
2220 PRINT "5 - Wisdom       ",W1,"6 - Constitution ",C1
2230 PRINT:PRINT:PRINT "YOUR ATTRIBUTES ARE:"
2240 PRINT "1 - Strength     ",ST,"2 - Charisma     ",CH
2250 PRINT "3 - Dexterity    ",DE,"4 - Intelligence ",IT
2260 PRINT "5 - Wisdom       ",WI,"6 - Constitution ",CO
2270 PRINT:PRINT "Which attributes will you fight with (2)";
2280 INPUT Z,Q
2290 IF (Z>0) AND (Z<7) AND (Q>0) AND (Q<7) AND (Z<>Q) THEN 2310
2300 PRINT "DON'T FOOL AROUND WITH A ";G$;" IN THE ROOM WITH YOU!!":GOTO 2280
2310 IF (Z=1) OR (Q=1) THEN MT=MT+S1:HT=HT+ST
2320 IF (Z=2) OR (Q=2) THEN MT=MT+H1:HT=HT+CH
2330 IF (Z=3) OR (Q=3) THEN MT=MT+D1:HT=HT+DE
2340 IF (Z=4) OR (Q=4) THEN MT=MT+I1:HT=HT+IT
2350 IF (Z=5) OR (Q=5) THEN MT=MT+W1:HT=HT+WI
2360 IF (Z=6) OR (Q=6) THEN MT=MT+C1:HT=HT+CO
2370 IF HT=MT THEN PRINT TAB(10);"You are evenly matched":GOTO 2420
2380 PRINT "It looks like the odds "
2390 PRINT "are in favour of ";
2400 IF HT>MT THEN PRINT "you"
2410 IF HT2420 PRINT "---------------------------------------"
2430 REM ** NEXT LINES CONTROL THE FIGHT ITSELF
2435 KK=0
2440 K=INT(RND(1)*7):IF K=KK THEN 2440
2445 KK=K
2450 FOR Z=1 TO 700:NEXT Z
2460 PRINT "The ";G$;" -";MT
2470 PRINT "     YOU -";HT
2480 PRINT "---------------------------------------"
2490 IF K=0 THEN PRINT "You struck a splendid blow!":MT=MT-1
2500 IF K=1 THEN PRINT "The ";G$;" strikes out":HT=HT-1:CH=CH-1
2510 IF K=2 THEN PRINT "You draw the ";G$;"'s blood":S1=S1-1
2520 IF K=3 THEN PRINT "You are wounded!!":IT=IT-1
2530 IF K=4 THEN PRINT "The ";G$;" is tiring":D1=D1-1
2540 IF K=5 THEN PRINT "You are bleeding...":WI=WI-1
2550 IF K=6 THEN PRINT "You wound the";G$:MT=MT-1
2560 IF (RND(1)>.25) AND (HT>0) AND (MT>0) THEN FOR T=1 TO 1600:NEXT T:GOTO 2440
2570 IF HT2580 PRINT "You have slain the ";G$
2590 ST=ST+2:DE=DE+2:WI=WI+2:CH=CH+2:IT=IT+2:CO=CO+2:MK=MK+1:GOTO 2670
2600 PRINT "The ";G$;" got the better of you that time..."
2610 IF (Z=1) OR (Q=1) THEN ST=4*INT(ST/5)
2620 IF (Z=2) OR (Q=2) THEN CH=3*INT(CH/4)
2630 IF (Z=3) OR (Q=3) THEN DE=6*INT(DE/7)
2640 IF (Z=4) OR (Q=4) THEN IT=2*INT(IT/3)
2650 IF (Z=5) OR (Q=5) THEN WI=5*INT(WI/6)
2660 IF (Z=6) OR (Q=6) THEN CO=INT(CO/2)
2670 A(RO,8)=0
2680 FOR Z=1 TO 500:NEXT Z
2690 RETURN
2700 REM ** OWN COMMANDS CARRIED OUT HERE
2710 REM
2720 REM
2730 REM
2740 REM
2750 REM
2760 REM
2770 REM
2780 REM
2790 REM
2800 REM
2810 REM
2820 REM
2830 REM
2840 REM
2850 REM
2860 REM
2870 REM
2880 REM ***********
2890 REM END OF GAME
2900 PRINT
2910 SC=0:REM ** SCORE
2920 IF QU<>4 THEN 2950
2930 PRINT "I did not imagine you would turn"
2940 PRINT TAB(5);"out to be a quitter!":GOTO 2990
2950 PRINT:PRINT "CONGRATULATIONS... You have completed"
2960 PRINT TAB(7) "the ADVENTURE!!!!"
2970 SC=100
2980 PRINT:PRINT
2990 SC=99*(SC+20*CASH+4*MK+ST+2*CH+3*DE+4+IT+5*WI+6*CO)/QU
3000 IF MK>0 THEN PRINT "You killed ";MK;" monsters"
3010 PRINT:PRINT TAB(7);"You found $";STR$(CASH);" worth"
3020 PRINT TAB(8);"Of treasure":PRINT
3030 PRINT:PRINT "Your score for this adventure is ";SC
3040 END
3050 REM ********************
3060 REM ** ROOM DESCRIPTIONS
3065 PRINT "You are in ";
3070 IF RO<9 THEN ON RO GOSUB 3090,3140,3190,3240,3290,3340,3390,3440
3075 IF RO>8 THEN ON RO-8 GOSUB 3490,3540,3590,3640,3690,3740,3790
3080 RETURN
3090 REM ** ROOM ONE
3100 PRINT "ROOM ONE"
3110 REM
3120 REM
3130 RETURN
3140 REM ** ROOM TWO
3150 PRINT "ROOM TWO"
3160 REM
3170 REM
3180 RETURN
3190 REM ** ROOM THREE
3200 PRINT "ROOM THREE"
3210 REM
3220 REM
3230 RETURN
3240 REM ** ROOM FOUR
3250 PRINT "ROOM FOUR"
3260 REM
3270 REM
3280 RETURN
3290 REM ** ROOM FIVE
3300 PRINT "ROOM FIVE"
3310 REM
3320 REM
3330 RETURN
3340 REM ** ROOM SIX
3350 PRINT "ROOM SIX"
3360 REM
3370 REM
3380 RETURN
3390 REM ** ROOM SEVEN
3400 PRINT "ROOM SEVEN"
3410 REM
3420 REM
3430 RETURN
3440 REM ** ROOM EIGHT
3450 PRINT "ROOM EIGHT"
3460 REM
3470 REM
3480 RETURN
3490 REM ** ROOM NINE
3500 PRINT "ROOM NINE"
3510 REM
3520 REM
3530 RETURN
3540 REM ** ROOM TEN
3550 PRINT "ROOM TEN"
3560 REM
3570 REM
3580 RETURN
3590 REM ** ROOM ELEVEN
3600 PRINT "ROOM ELEVEN"
3610 REM
3620 REM
3630 RETURN
3640 REM ** ROOM TWELVE
3650 PRINT "ROOM TWELVE"
3660 REM
3670 REM
3680 RETURN
3690 REM ** ROOM THIRTEEN
3700 PRINT "ROOM THIRTEEN"
3710 REM
3720 REM
3730 RETURN
3740 REM ** ROOM FOURTEEN
3750 PRINT "ROOM FOURTEEN"
3760 REM
3770 REM
3780 RETURN
3790 REM ** ROOM FIFTEEN
3800 PRINT "ROOM FIFTEEN"
3810 REM
3820 REM
3830 RETURN
3840 REM *******************
3850 REM ** DESCRIBE OBJECTS
3860 PRINT
3870 PRINT TAB(3);"You can see :"
3880 IF A(RO,5)<>0 THEN PRINT TAB(4);O$(A(RO,5))
3890 IF A(RO,6)<>0 THEN PRINT TAB(4);O$(A(RO,6))
3900 IF A(RO,7)<>0 THEN PRINT TAB(4);O$(A(RO,7))
3910 FOR Z=1 TO 500:NEXT Z
3920 PRINT
3930 RETURN
3940 REM *************
3950 REM ** INITIALISE
3960 DIM A(16,8),P(5),O$(8),V(20),M$(8),T(5)
3970 REM ** NEXT LINES DECIDE HUMAN ATTRIBUTES
3980 ST=INT(RND(1)*6+RND(1)*6+RND(1)*6)+3
3990 CH=INT(RND(1)*6+RND(1)*6+RND(1)*6)+3
4000 DE=INT(RND(1)*6+RND(1)*6+RND(1)*6)+3
4010 IT=INT(RND(1)*6+RND(1)*6+RND(1)*6)+3
4020 WI=INT(RND(1)*6+RND(1)*6+RND(1)*6)+3
4030 CO=INT(RND(1)*6+RND(1)*6+RND(1)*6)+3
4040 CASH=0:REM ** TREASURE
4050 RO=9:REM ** STARTING ROOM
4060 QU=1:REM ** END OF GAME FLAG
4070 MK=0:REM ** MONSTERS KILLED
4080 C$=""
4090 REM ** SET UP ROOMS
4100 FOR X=1 TO 16
4110 FOR Y=1 TO 4
4120 READ A(X,Y)
4130 NEXT Y
4140 NEXT X
4150 REM ** DISTRIBUTE TREASURE
4160 FOR Z=1 TO 8
4170 READ O$(Z),V(Z)
4180 NEXT Z
4190 FOR Q=5 TO 8
4200 Z=INT(RND(1)*15+1)
4210 IF A(Z,5)<>0 THEN 4200
4220 A(Z,5)=Q:REM ** OBJECT NO. IN ROOM
4230 NEXT Q
4240 PRINT
4250 REM ** DISTRIBUTE MONSTERS
4260 FOR J=1 TO 8
4270 READ M$(J)
4280 Z=INT(RND(1)*15+1)
4290 IF A(Z,8)<>0 THEN 4280
4300 A(Z,8)=J
4310 NEXT J
4320 PRINT CHR$(26)
4340 RETURN
4350 REM ******************************
4360 REM ** ROOM DATA
4370 DATA 0,4,0,0:REM * ROOM 1
4380 DATA 0,5,3,0:REM * ROOM 2
4390 DATA 16,0,0,2:REM * ROOM 3
4400 DATA 1,8,5,0:REM * ROOM 4
4410 DATA 2,0,6,4:REM * ROOM 5
4420 DATA 0,0,0,5:REM * ROOM 6
4430 DATA 0,13,0,0:REM * ROOM 7
4440 DATA 4,11,0,0:REM * ROOM 8
4450 DATA 0,12,10,0:REM * ROOM 9
4460 DATA 0,0,0,9:REM * ROOM 10
4470 DATA 8,14,12,0:REM * ROOM 11
4480 DATA 9,0,13,11:REM * ROOM 12
4490 DATA 7,0,0,12:REM * ROOM 13
4500 DATA 11,0,15,0:REM * ROOM 14
4510 DATA 0,0,0,14:REM * ROOM 15
4520 DATA 0,3,0,0:REM * ROOM 16
4530 REM ** OBJECT DATA
4540 DATA "RING",567
4550 DATA "KEY",2
4560 DATA "LOCKET",15
4570 DATA "ELVEN-GOLD",799
4580 DATA "SWORD",0,"AXE",0
4590 DATA "AMYTHEST",27
4600 DATA "CRYSTAL",45
4610 REM ** MONSTER NAMES
4620 DATA "ENTANGLER"
4630 DATA "ARTIFACTUM"
4640 DATA "INKBLOTT"
4650 DATA "UGLY UNDEAD"
4660 DATA "'ORRIBLE ORC"
4670 DATA "ICE-DRAGON"
4680 DATA "EMBIHUUND"
4690 DATA "INSALIVATE"

[Pinacolada]

Nice!

320 REM ** NEXT LINE CHECKS IF ANY ATTRIBUTE IS ZERO **
330 IF ST*CH*DE*CO*IT*WI<>0 THEN 380

Now that is a grand idea. Simple, and elegant... I shall have to remember that in case it ever comes up in writing TADA...