100 CLEAR 500: DIM T$(36,2)
110 DATA A,B,C,D,E,F,G,H,I ,J,K,L,M,N,O,P,Q,R,S
120 DATA T,U,V,W,X,Y,Z,0, 1,2,3,4,5,6,7,8,9
130 FOR I=1 TO 36: READ T$(I,1): NEXT I
140 CLS: PRINT@10,"CRYPTOGRAPHY"
150 PRINT@64,"SELECT ONE OF THE FOLLOWING:"
160 PRINT@96,"1. DECODE (CHANGE CODE TO"
170 PRINT@131,"ENGLISH) BY TABLE"
180 PRINT@160,"2. ENCODE (CHANGE ENGLISH TO"
190 PRINT@195,"CODE) BY TABLE"
200 PRINT@224,"WHICH ONE";: INPUT A$
210 IF A$="1" OR A$="2" THEN 250
220 PRINT@448,"INVALID SELECTION--TRY AGAIN"
230 FOR I=1 TO 300: NEXT I
240 PRINT@234,"": GOTO200
230 IF A$="1" THEN P$="CODE-TO-ENGLISH"
260 IF A$="2" THEN P$="ENGLISH-TO-CODE"
270 CLS: PRINT@8,P$
280 PRINT@64,"ENTER TABLE:"
290 FOR I=1 TO 36
300 IF I=1 THEN PP=98
310 IF I=27 THEN PP=194
320 PRINT@PP,T$(I,1);
330 PP=PP+1: NEXT I
340 FOR I=1 TO 36
350 IF I=1 THEN PP=129: B$="": C$=""
360 IF I=27 THEN PP=225: C$=""
370 IF B$=CHR$(13) THEN T$(I,2)=T$(I,1): GOTO450
380 PRINT@PP,"";: B$=INKEY$
390 IF B$="" THEN 380
400 IF B$=CHR$(13) THEN 370
410 C$=C$+B$: PRINT@PP+2-LEN(C$),C$
420 IF B$=CHR$(32) THEN T$(I,2)=T$(I,1): GOTO440
430 T$(I,2)=B$
440 PP=PP+1
450 NEXT I
460 IF A$="1" THEN A1=2: A2=1
470 IF A$="2" THEN A1=1: A2=2
480 CLS: PRINT@0,"ENTER TEXT TO BE TRANSLATED:"
490 PRINT@33,"(PRESS <ENTER> TO END)"
500 PL=32
510 IF PL<384 THEN PL=PL+64: GOTO550
520 PRINT@480,"PRESS ANY KEY TO CONTINUE";: B$=INKEY$
530 IF B$="" THEN 520
540 CLS: PL=0
550 PP=0: C$=""
560 PRINT@PL+PP,"";: B$=INKEY$
570 IF B$="" THEN 560
580 IF B$=CHR$(13) THEN GOSUB700: GOTO620
590 C$C$+BS: PRINT@PL+PP+2-LEN(C$),C$
600 IFLEN(C$)>29 THEN GOSUB700: GOTO510
610 PP=PP+1: GOTO560
620 PRINT@448,"PRESS N FOR NEW TABLE,"
630 PRINT@480,"1 FOR DECODE, OR 2 FOR ENCODE";: A$=INKEY$
640 IF A$="" THEN 630
650 IF A$="N" THEN 140
660 IF A$="1" OR A$="V' THEN 460
670 IF A$="1" OR A$="2" THEN 460
680 GOTO630
690 REM - PRINT TRANSLATED TEXT
700 L=LEN(C$): IF L<2 THEN 810
710 SOUND 125,3
720 PL=PL+32: PP=0: D$=""
730 FOR I=1 TO L
740 J=0: B$=MID$(C$,I,1)
750 IF J<36 THEN J=J+1: GOTO770
760 B$="*": GOTO790
770 IF B$=T$(J,A1) THEN B$=T$(J,A2): GOTO790
780 GOTO750
790 D$=D$+B$: PRINT@PL+PP+2-LEN(D$),D$
800 PP=PP+1: NEXT I
810 RETURN