Subj : Re: while(in)
To   : borland.public.cpp.borlandcpp
From : Les Hurley <lesmail@pa.net>
Date : Mon Mar 22 2004 10:03 pm

ps Wayne's method works just fine.  Thanks.

Les Hurley wrote:

> Well here is the helpfile description of while:
> Syntax
> while [( condition )] [{statement_list}]
>
> condition Either TRUE or FALSE. When FALSE, statement_list stops
> executing.
> statement_list The list of statements to execute.
>
> Description
> If no condition is specified, the while clause is equivalent to
> while(TRUE).
> Because the test takes place before any statements execute, if
> condition
> evaluates to FALSE on the first pass, the loop does not execute.
>
> This sounds to me like the condition is tested before the statement
> block is
> entered and no statements executed if the condition is false.
>
> "Wayne A. King" wrote:
>
> > On Sun, 21 Mar 2004 23:05:26 -0500, Les Hurley <lesmail@pa.net> wrote:
> >
> > >   while(in){in>>n;
> > >                 cout<<n<<"  ";}
> >
> > End of file is set when you try to read *past* the last data in the file.
> > Thus the eof flag gets set the first time your in >> n extraction fails.
> > But you're displaying the variable n even when the extraction fails,
> > and it still contains the value from the last successful extraction.
> > See if this works better:
> >
> > while(in >> n){cout<<n<<"  ";}
> >
> > --
> > Wayne A. King
> > (waking@idirect.com, Wayne_A_King@compuserve.com)

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