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From: "zork" <zork@nospam.com>
Newsgroups: comp.lang.ada
References: <40fea9b7@dnews.tpgi.com.au> <kDyLc.157648$XM6.36144@attbi_s53>
Subject: Re: unconstrained array type problems
Date: Thu, 22 Jul 2004 09:11:23 +1000
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Date: 2004-07-22T09:11:23+10:00
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Thanks for the help everyone! The transition from c++ to ADA doesnt seem
that smooth. But im getting there.

thanks!
zork

<tmoran@acm.org> wrote in message news:kDyLc.157648$XM6.36144@attbi_s53...
> >open (file)
> >
> >read in dimensions of array1
> >create the array1
> >fill the array1
> >
> >read in dimensions of array2
> >create the array2
> >fill the array2
> >
> >close (file)
> >
> >allow the arrays to interact with one another
> >---
> >
> >I cannot see a way around this.
>
>
> Repeating and expanding on Marius Amado Alves message:
> > > How can i make them visible to one another? This is so easy to do in
> > > c++/java.
> >
> > This is extremely easy in Ada with the proper design, namely with these
> > two entities:
> >
> >     type Matrix is array (Positive range <>, Positive range <>) of Real;
>     function Read_Matrix(File : File_Type) return Matrix is
>       Row_Count, Column_Count : Positive;
>     begin
>       Get (File, Row_Count);
>       Get (File, Column_Count);
>       declare
>         Result: Matrix_Type (1 .. Row_Count, 1 .. Column_Count);
>       begin
>         -- read in matrix data
>         return Result;
>       end;
>     end Read_Matrix;
> >
> > Then read all the matrices you want in the same place:
> >
>     procedure Do_Matrices is
> >     Matrix_1 : Matrix := Read_Matrix(File);
> >     Matrix_2 : Matrix := Read_Matrix(File);
>       Product  : Matrix(Matrix_1'range(1), Matrix_2'range(2)); -- for
example
>     begin
>       -- do stuff with Matrix_1 and Matrix_2
>     end Do_Matrices;