From: tmoran@acm.org
Subject: Re: unconstrained array type problems
Date: Wed, 21 Jul 2004 18:30:40 GMT
Date: 2004-07-21T18:30:40+00:00 [thread overview]
Message-ID: <kDyLc.157648$XM6.36144@attbi_s53> (raw)
In-Reply-To: 40fea9b7@dnews.tpgi.com.au
>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;
next prev parent reply other threads:[~2004-07-21 18:30 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-21 15:04 unconstrained array type problems zork
2004-07-21 15:09 ` Ludovic Brenta
2004-07-21 15:33 ` zork
2004-07-21 15:54 ` Marius Amado Alves
2004-07-21 16:24 ` Ludovic Brenta
2004-07-21 17:33 ` Georg Bauhaus
2004-07-21 17:35 ` zork
2004-07-21 18:30 ` tmoran [this message]
2004-07-21 23:11 ` zork
2004-07-22 7:57 ` Martin Krischik
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