What is the best BASIC Pocket Computer
04-16-2014, 12:47 AM
Post: #70
 Dave Britten Senior Member Posts: 2,251 Joined: Dec 2013
RE: What is the best BASIC Pocket Computer
(04-15-2014 10:03 PM)Guenter Schink Wrote:  Your factors program would be interesting to compare.

Here you go, prime factors in GW-BASIC. I haven't done any real performance tuning, apart from selecting an algorithm that's more efficient than "2 plus all the odd numbers".

Code:
5 DEFDBL X,F,M 10 INPUT "X=";X 15 ST=TIMER 20 M=INT(SQR(X)) 30 F=0 40 DATA 2,1,2,2 50 FOR I=1 TO 4 60 READ S:GOSUB 500 70 NEXT I 100 IF X<=1 THEN 900 105 DATA 4,2,4,2,4,6,2,6 110 FOR I=1 TO 8 120 READ S:GOSUB 500 130 NEXT I 140 RESTORE 105 190 IF F>M THEN F=X:S=0:GOSUB 500 200 GOTO 100 500 F=F+S 510 IF X/F<>INT(X/F) THEN RETURN 520 X=X/F 530 M=INT(SQR(X)) 540 PRINT F; 550 GOTO 510 900 ET=TIMER:PRINT 910 PRINT "Execution time: "; 920 PRINT USING "####.####";ET-ST;:PRINT "s" 930 END
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