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From: Corey Ashford <yeroca@rocketmail.com>
Subject: Re: scope and/or parameters (beginner)
Date: 1999/04/05
Message-ID: <37084459.8616007@rocketmail.com>#1/1
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Date: 1999-04-05T00:00:00+00:00
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fluffy_pink@dsuper.net wrote:
[snip]
> 
> If for "(QUESTION)" I use "Second_Variable" the compiler tells me that
> for an OUT or an IN OUT I must have an actual parameter that **is a
> variable***.  I don't understand why it tells me this.

"IN" parameters are considered read-only.  You've tried to pass it to
a procedure which may attempt to change its value - something that
isn't allowed to a read-only variable.  Treat "IN" parameters as
constants that are defined when the subprogram is invoked.

[snip]
> 
> How can I pass the value of Var_2 from my main program, into
> One_Procedure, and then from One_Procedure into Internal_Procedure,
> and then to make it come back out modified (IN OUT) so that it will
> end up in One_Proc�dure ?  I don't want to use the modified value of
> Var_2 (modified by Internal_Procedure) at the main program level; I
> want to use it only in One_Proc�dure.

[snip]

Well, you could change the definition of One_prog so that its
Second_Variable is of type "IN OUT The_Type", instead of just IN.  Then
you could call Inner_Procedure legally with Second_Variable.



- Corey