Subject: Re: max int value
To: Peter Seebach <email@example.com>
From: Fong Siu Lung Gordon <firstname.lastname@example.org>
Date: 05/16/2000 14:33:36
On Tue, 16 May 2000, Peter Seebach wrote:
> In message <Pine.SOL.email@example.com>, Fong
> Siu Lung Gordon writes:
> >Sorry for not detail describe my problem. The problem is to calculate the
> >check digit for barcode which is use as the borrow card number (14 digits
> >long). However, my system (i386) only count the first 10 digits only. any
> >clue. ? Thanks.
> Yes, don't use integer types. You're working with a string, not a number.
> (Seriously; I did barcode software in another incarnation, back at Xerox.
> What you have is *NOT* a number; it is a 14-character string which happens
> to contain digits.)
Yes, 14-character. My method is to individually cut the 14-character into
14 tokens and calculate the check digit from these tokens. It works. The
problem is I have to calculate the check digit for a series of borrow card
not just one and I don't to type it again and again. The method I though
of is to make a copy the start borrow card and increment by 1 each time.
Then re-calculate the check digit and the new borrow card number. The
probelm is max int of my system (i386) is largest enough to hold the
14-charater digit. That is the point.