10 GOSUB 5000
20 CLS
30 PRINT "Options:"
40 PRINT "1: Shuffle deck"
50 PRINT "2: Deal cards"
60 PRINT "3: Display deck"
70 INPUT o
80 IF o<1 OR o>3 OR o<>INT o THEN GOTO 70
90 GO SUB (o+1)*1000
100 GO TO 20

999 REM convert index to card
1000 LET s=INT ((x-1)/13)+1
1010 LET p=x-13*(s-1)
1020 LET n=s-2*INT (s/2)+1
1030 LET c$=p$(p)+CHR$ 16+CHR$ (n AND n>1)+s$(s): REM colour codes to force red or black
1040 RETURN

1999 REM shuffle - only a naive shuffle algorithm but it'll do; the modularity of the program means this is easy enough to modify
2000 CLS : PRINT FLASH 1;"Shuffling..."
2010 LET s=1: REM changing s allows shuffling the remainder of an undealt deck, say
2020 FOR x=1 TO 100
2030 LET a=INT (RND*53-s)+s
2040 LET b=INT (RND*53-s)+s
2050 LET n=d(a)
2060 LET d(a)=d(b)
2070 LET d(b)=n
2080 NEXT x
2090 RETURN

2999 REM deal
3000 INPUT "How many players? ";p
3010 INPUT "How many cards? ";c
3020 IF c<1 OR p<1 OR c<>INT c OR p<>INT p THEN PRINT "Don't be silly!": GO TO 3000
3030 IF c*p>52 THEN PRINT "Not enough cards for that!": GO TO 3000
3040 CLS : DIM h(p,c)
3050 LET k=1
3060 FOR f=1 TO c
3070 FOR e=1 TO p
3080 LET h(e,f)=d(k)
3090 LET k=k+1
3100 NEXT e
3110 NEXT f
3120 FOR e=1 TO p
3130 PRINT "Player ";e;"'s hand:"
3140 FOR f=1 TO c
3150 LET x=h(e,f)
3160 GO SUB 1000
3170 PRINT c$;" ";
3180 NEXT e
3190 PRINT
3200 NEXT f
3210 PRINT
3220 PRINT "Remaining deck:"
3230 IF c*p=52 THEN PRINT "none"
3240 GO SUB 4010
3250 RETURN

3999 REM display deck
4000 CLS : LET k=1
4010 FOR y=k TO 52: REM enter here with k>1 to show the rest of an undealt deck
4020 LET x=d(y)
4030 GO SUB 1000
4040 PRINT c$
4050 NEXT y
4060 FOR y=0 TO 1000
4070 NEXT y
4080 RETURN

4999 REM initialise
5000 DIM d(52)
5010 GO SUB 6000
5020 LET s$=CHR$ 144+CHR$ 145+CHR$ 146+CHR$ 147: REM or LET s$="HSDC" if you don't want symbols
5030 LET p$="A23456789TJQK"
5040 FOR x=1 TO 52
5050 LET d(x)=x
5060 NEXT x
5070 RETURN

5999 REM characters - the ZX Spectrum character set doesn't contain suit symbols
6000 RESTORE 7000
6010 FOR x=65368 TO 65399
6020 READ a
6030 POKE x,a
6040 NEXT x
6050 RETURN

7000 DATA BIN 01101100: REM 108
7010 DATA BIN 11111110: REM 254
7020 DATA BIN 11111110: REM 254
7030 DATA BIN 11111110: REM 254
7040 DATA BIN 01111100: REM 124
7050 DATA BIN 00111000: REM 56
7060 DATA BIN 00010000: REM 16
7070 DATA BIN 00000000: REM 0

7080 DATA BIN 00010000: REM 16
7090 DATA BIN 00111000: REM 56
7100 DATA BIN 01111100: REM 124
7110 DATA BIN 11111110: REM 254
7120 DATA BIN 01010100: REM 84
7130 DATA BIN 00010000: REM 16
7140 DATA BIN 01111100: REM 124
7150 DATA BIN 00000000: REM 0

7160 DATA BIN 00010000: REM 16
7170 DATA BIN 00111000: REM 56
7180 DATA BIN 01111100: REM 124
7190 DATA BIN 11111110: REM 254
7200 DATA BIN 01111100: REM 124
7210 DATA BIN 00111000: REM 56
7220 DATA BIN 00010000: REM 16
7230 DATA BIN 00000000: REM 0

7240 DATA BIN 00010000: REM 16
7250 DATA BIN 00111000: REM 56
7260 DATA BIN 01010100: REM 84
7270 DATA BIN 11111110: REM 254
7280 DATA BIN 01010100: REM 84
7290 DATA BIN 00010000: REM 16
7300 DATA BIN 01111100: REM 124
7310 DATA BIN 00000000: REM 0