Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!mcsun!ukc!newcastle.ac.uk!turing!n01qu
From: A.G.Poole@newcastle.ac.uk (Ford (Alex Poole))
Newsgroups: comp.lang.pascal
Subject: Re: DYNIX Pascal compiler
Keywords: compiler
Message-ID: <1991Feb19.141528.23310@newcastle.ac.uk>
Date: 19 Feb 91 14:15:28 GMT
References: <mtbb114.666785733@s.ms.uky.edu>
Sender: news@newcastle.ac.uk
Organization: University of Newcastle upon Tyne, UK, NE1 7RU
Lines: 36

mtbb114@ms.uky.edu (Jerry Duffy) writes:

>This maybe a stupid question, but does anyone
>know what it means when it gives the error
>number 172 'Control variable of a for statement
>must be local?'

The problem is probably in a function or procedure; you have to define the variable being used in
the FOR loop within the procedure, even if it normally exists as a global.

eg

PROGRAM blah (etc.);
VAR
   i:INTEGER;

PROCEDURE loop;
VAR
   i:INTEGER;
BEGIN
   FOR i:=1 TO 1 DO
      writeln
END;

BEGIN
   loop
END.

As it stands, you'll get a 'variable i declared but not used' message instead, as its defined
globally but only used locally.

Hope that helps!!

Ford
-----
I come from a good home - thats why they don't want me back.