Path: utzoo!attcan!uunet!lll-winken!lll-ncis!oodis01!uplherc!wicat!meph!gsarff
From: gsarff@meph.UUCP (Gary Sarff)
Newsgroups: comp.lang.pascal
Subject: Re: Control variables in FOR loops
Message-ID: <00056@meph.UUCP>
Date: 19 Dec 88 16:09:30 GMT
Organization: WICAT Systems Inc. Orem, Utah (Engineering-R & D)
Lines: 20

In article <4267@okstate.UUCP> garnett@a.cs.okstate.edu (John Garnett)
>From article <1440@csuna.UUCP>, by abcscnuk@csuna.UUCP (Naoto Kimura):
>> I have only found one compiler that handles the program I
>> gave in my previous message correctly.   It is the pascal
>> compiler (vers 4) found on the CDC Cyber 750 here at CSUN.
>> The compiler should give the error message "Control variable
>> must be local."
>> 
>
>Isn't it also true that the value of 'i' will be undefined following the
>termination of the loop contained in procedure 'barf'?  If this is the
>case, then the loop contained in 'ack' should bomb after the first call
>to 'barf' (assuming the global variable 'i' is allowed as a lcv)

Depends on how the compiler makes 'i' undefined, if there is some way to
put a NaN (not a number) in i for example.  For the record my compiler
Pascal 4.4 on Wicat Systems computers (68020 based) also gives an
error message, "for loop index must be local" and won't compile the
program.


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