Re: Strange behavior w/%editc()

["Dare @ Work" <oludare@xxxxxxxxxxxxx>]

I must have forgotten my algebra, correct me if I'm wrong. My understanding
is that:

If X=9999, then
X -(-1)=?
(9999) - (-1) = 10000

but if X= -9999, then
X - (-1) = ?
(-9999) - (-1) = -9998


----- Original Message -----
From: <rob@dekko.com>
To: <rpg400-l@midrange.com>
Sent: Tuesday, February 26, 2002 10:58 AM
Subject: Re: Strange behavior w/%editc()


>
> That is not what I meant.  I meant that
> x - (-1) is really an addition.  If x was 9999, then x - (-1) would be
> 10000 or 0000 if x had only 4 digits.
>
> But ?Vernon? pointed out that if x was -9999 then x - 1 would be -10000
> which would also pose a dilemma.
>
> Rob Berendt
> --
> "They that can give up essential liberty to obtain a little temporary
> safety deserve neither liberty nor safety."
> Benjamin Franklin
>
>
>
>                     "Dare @ Work"
>                     <oludare                To:
<rpg400-l@midrange.com>
>                     Sent by:                cc:
>                     rpg400-l-admin@mi       Fax to:
>                     drange.com              Subject:     Re: Strange
behavior w/%editc()
>
>
>                     02/26/2002 10:39
>                     AM
>                     Please respond to
>                     rpg400-l
>
>
>
>
>
>
> >(Negative minus a negative is an addition).
> Do you mean Negative "multiply" by Negative is an addition?
>
> ----- Original Message -----
> From: <rob@dekko.com>
> To: <rpg400-l@midrange.com>
> Sent: Tuesday, February 26, 2002 10:34 AM
> Subject: RE: Strange behavior w/%editc()
>
>
> >
> > >This is part and parcel of the 'expression' rules for EVAL.
> > Basically, 'fiscalYr - 1' is an expression.  In order to hold all the
> > possible digits of the resulting value, the compiler applies some rules
> to
> > create an 'intermediate' or 'work' variable.  The %editc() is working
> > against the work variable.
> >
> > I wondered about that.  I should have tested that.  Changing my program
> > from:
> >        headdesc = 'Fixed Model FY ' + %editc(fiscalYr - 1:'X');
> >        dsply headdesc;
> >        headdesc = 'Fixed Model FY ' + %editc(year1 - 1:'X');
> >        dsply headdesc;
> >        headdesc = 'Fixed Model FY ' + %editc(year2 - 1:'X');
> >        dsply headdesc;
> >        headdesc = 'Fixed Model FY ' + %editc(year3 - 1:'X');
> >        dsply headdesc;
> > to:
> >        headdesc = 'Fixed Model FY ' + %editc(fiscalYr:'X');
> >        dsply headdesc;
> >        headdesc = 'Fixed Model FY ' + %editc(year1:'X');
> >        dsply headdesc;
> >        headdesc = 'Fixed Model FY ' + %editc(year2:'X');
> >        dsply headdesc;
> >        headdesc = 'Fixed Model FY ' + %editc(year3:'X');
> >        dsply headdesc;
> > changed the results from:
> > DSPLY  Fixed Model FY 02001
> > DSPLY  Fixed Model FY 02002
> > DSPLY  Fixed Model FY 02003
> > DSPLY  Fixed Model FY 002004
> > to:
> > DSPLY  Fixed Model FY 2002
> > DSPLY  Fixed Model FY 2003
> > DSPLY  Fixed Model FY 2004
> > DSPLY  Fixed Model FY 02005
> >
> >
> > It just baffles me as to why the compiler thought to add an extra digit
> on
> > a subtraction.  Granted if it was a variable, and there was a
possibility
> > that the variable was negative, then it would make sense.  (Negative
> minus
> > a negative is an addition.  And if year was 9999 -(-1) would be 10000 or
> > 0000 in 4 digits.)  But that isn't the case here.
> >
> > Rob Berendt
> > --
> > "They that can give up essential liberty to obtain a little temporary
> > safety deserve neither liberty nor safety."
> > Benjamin Franklin
> >
> > _______________________________________________
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