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From: Kilgallen@SpamCop.net (Larry Kilgallen)
Newsgroups: comp.lang.ada
Subject: Re: Beginer problem: variable array size
Date: 15 Sep 2002 10:45:56 -0600
Organization: LJK Software
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Date: 2002-09-15T10:45:56-06:00
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In article <am26u4$d2q$1@nsnmpen2-gest.nuria.telefonica-data.net>, "Nacho" <NACHANGA@terra.es> writes:
> Hi everyone!
> 
> I am learning ada and i have to implement an array of unknown size until
> rutime.
> The array must be resizable at runtime. This is easy to achieve for me in
> other lenguajes like c++, but i am new to ada and i don't know hot to
> resolve the problem. The solution in c++ code could be:
> 
> 
> 
> int variable=50;    //let's make an array of 50 elements.
> int* p;    //pointer to int, if the array is of integers.
> p=new int[variable];    //we reserve memory for 50 integers.
> 
> 
> ....  //some code with the array here.
> 
> delete [] p;    //we free the allocated memory for the array.
> variable=80;    //we change the size of the array.
> p=new int[variable];    //we have a new array with the new size.

Wow, C looks like a lot of work !!!!!

	... preceding Ada statements

	declare	-- scope of array_called_p
	    type my_array_type is array ( positive range <> ) of integer;
	    array_called_p : my_array_type ( 1 .. variable );
	begin	-- scope of array_called_p
	    ... Ada statements that use array_called_p
	end;	-- scope of array_called_p

	... following Ada statements

In general, Ada rarely requires pointers.