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From: defaria@hpcupt3.cup.hp.com (Andy DeFaria)
Newsgroups: comp.lang.pascal
Subject: Re: need dynamic array on heap
Message-ID: <45670011@hpcupt3.cup.hp.com>
Date: 15 Apr 91 16:59:45 GMT
References: <1991Apr12.234843.9031@ux1.cso.uiuc.edu>
Organization: Hewlett Packard, Cupertino
Lines: 34

>/ hpcupt3:comp.lang.pascal / amead@s.psych.uiuc.edu (alan mead) /  3:48 pm  Apr 12, 1991 /
>I want to put aside a chunk of the heap and then index it by byte like 
>an array of byte.  I could just declare it as some type like 
>'array[1..64000] of byte', but I want to use GetMem so that the array will
>really be dynamic (I don't want to use 64K each time).
>
>So, I'm trying this:
>
>program Test;
>  type
>    C_arrayType = array[1..1] of byte;
>  var
>    Buff : ^C_arrayType;
>  begin
>    GetMem( Buff,1000 );
>    Buff[1]^ := 2;
>  end.
>
>But I get 
>
>  Buff[1]^ := 2;
>      ^ Invalid qualifier
>
>so does anyone know, is this sort of thing possible?  Can you do this
>easily in C?

Change the TYPE to

  type
    C_arrayType = array[1..64000] of byte;

After all a type doesn't allocate any memory, it is the getmem that will
allocate the memory on the heap.  When you say Buff[1] TP knows that they
array only goes 1..1 so you get a compiler error.