Path: utzoo!attcan!uunet!mcvax!enea!dkuug!ambush!ambone!leif
From: leif@ambone.UUCP (Leif Andrew Rump)
Newsgroups: comp.lang.pascal
Subject: Re^2: Control variables in FOR loops
Message-ID: <449@ambone.UUCP>
Date: 18 Jan 89 10:17:38 GMT
References: <00056@meph.UUCP> <7822@boring.cwi.nl>
Organization: AmbraSoft A/S (Denmark)
Lines: 20

dik@cwi.nl (Dik T. Winter) writes:
>In article <00056@meph.UUCP> gsarff@meph.UUCP (Gary Sarff) writes:
> > In article <4267@okstate.UUCP> garnett@a.cs.okstate.edu (John Garnett)
> > >Isn't it also true that the value of 'i' will be undefined following the
> > >termination of the loop contained in procedure 'barf'?
> > 
> > Depends on how the compiler makes 'i' undefined, if there is some way to
> > put a NaN (not a number) in i for example.
>But a compiler is not required to take action to make 'i' undefined.
>Undefined is just that: the standard does not predict the value present

It will ease debugging if the runtime system is able to detect 'NaN'.
A lot of computers use two complement meaning (in a 16 bit
environment) that the range goes from -32768 to 32767. Use -32768 as
'Nan' and you have a 'normal' range -32767 to 32767...

 Leif Andrew Rump, AmbraSoft A/S, Roejelskaer 15, DK-2840 Holte (Denmark)
 UUCP: leif@ambone.dk, phone: +45 2424 111, touch phone: +45 422 817 + 313

   > > > Why are tall Irish girls with red hair so wonderful ? ? ? < < <