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From: Kai_Henningsen@ms.maus.de (Kai Henningsen)
Newsgroups: comp.lang.pascal
Subject: Re: need dynamic array on heap
Message-ID: <13761@ms.maus.de>
Date: 21 Apr 91 17:10:00 GMT
Article-I.D.: ms.13761
Distribution: world,comp
Organization: Maus Mailbox Netz - UUCP-Gateway Bremen
Lines: 27


JG>In article <1991Apr12.234843.9031@ux1.cso.uiuc.edu> amead@s.psych.uiuc.edu (
JG>>I want to put aside a chunk of the heap and then index it by byte like
JG>>an array of byte.  I could just declare it as some type like
JG>>'array[1..64000] of byte', but I want to use GetMem so that the array will
JG>>really be dynamic (I don't want to use 64K each time).
JG>>
JG>>  Buff[1]^ := 2;
JG>>      ^ Invalid qualifier
JG>>
JG>>so does anyone know, is this sort of thing possible?  Can you do this
JG>>easily in C?

Of course it's possible, even in TP. Do exactly what you would do with new,
only use GetMem:

type tBuff = array [0 .. maxit] of byte;
var Buff: ^tBuff;
begin
  GetMem(Buff, 1864);
  Buf^[17] := 42;

...

I do that all the time ...

MfG Kai