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From: Ludovic Brenta <ludovic@ludovic-brenta.org>
Newsgroups: comp.lang.ada
Subject: Re: Can I convert a string of letters into an array?
Date: Tue, 6 Mar 2012 00:29:58 -0800 (PST)
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Date: 2012-03-06T00:29:58-08:00
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Will wrote on comp.lang.ada:
> Here is the problem, "Write a procedure that takes in a string of 'B'
> and 'G' characters.  The procedure should rearrange the letters into
> an alternating 'B'-'G' pattern that continues until the less numerous
> letter runs out.  Assume the string only contains 'B's and 'G's; that
> the patter you create always starts with a 'B'; and that the string
> will always contain at least 1 of each letter.  For example:
> "BBBBGGGBG" becomes "BGBGBGBGB", and "GGBG" becomes "BGGG"."

As others have said, a string is, by definition, an array of Characters,
so you don't need to "convert a string of letters into an array".  Your
teacher should have already explained to you how to access individual
elements (Characters) in an array (String), so this homework assignment
should be no challenge to you.  To get you started, here is a skeleton
where you "just" need to fill in the blanks:

function Rearrange (Input : in String) is
   Result : String (Input'Range);
   Number_Of_Bs : Natural;
   Number_Of_Gs : Natural;
begin
   ...
   return Result;
end Rearrange;

I hope I didn't say too much...

-- 
Ludovic Brenta.