Xref: utzoo comp.lang.misc:1414 comp.lang.pascal:785
Path: utzoo!mnetor!uunet!amdahl!ames!mailrus!tut.cis.ohio-state.edu!bloom-beacon!mit-eddie!bbn!rochester!PT.CS.CMU.EDU!B.GP.CS.CMU.EDU!Ralf.Brown@B.GP.CS.CMU.EDU
From: Ralf.Brown@B.GP.CS.CMU.EDU
Newsgroups: comp.lang.misc,comp.lang.pascal
Subject: Re: Loops
Message-ID: <225cd329@ralf>
Date: 8 Apr 88 12:18:33 GMT
Sender: netnews@PT.CS.CMU.EDU
Lines: 21
Summary: Turbo Pascal uses hidden loop counters for security
In-Reply-To: <11047@shemp.CS.UCLA.EDU>


In article <11047@shemp.CS.UCLA.EDU>, gast@lanai.cs.ucla.edu (David Gast) writes:
}While it is commonly believed that it is impossible to change the
}index variable in a for loop, it is possible to do so.  Consider the
}following program.
}
[code deleted for brevity]
}
}David Gast
}gast@cs.ucla.edu
}{ucbvax,rutgers}!ucla-cs!gast

I don't know about Turbo Pascal 4.0, but versions 1 through 3 use a "hidden"
variable for the loop counter, so you can change the visible loop counter
to your heart's content and the loop will still execute exactly the same
number of times.

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