Date: Sun, 20 Nov 1994 17:58:27 -0500 (CDT)
From: Aaron Ucko <UCKO AT VAX1 DOT ROCKHURST DOT EDU>
Subject: Re: HUGE exe
To: OKRA AT max DOT tiac DOT net
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Organization: Rockhurst College; Kansas City, MO

>  Want to see a BIG program?  Here it is:
>
>
>char Map[256][512];
>
>int main() {
>
>  memset(CellMap,0,sizeof(CellMap));
>}
>
>
>  The exe it makes is about 156k.  Anybody know how to tell memset that I 
>really want it to run at RUN TIME?  It "optimizes" itself even with 
>optimizations off.

If you want your array to be allocated dynamically, you can't declare it as
allocated statically.  You need code like this:

char **CellMap;
int main() {
  int i;
  CellMap=malloc(256 * sizeof(char *));
  CellMap[0]=malloc(256 * 512); /* so we can set it to 0 in 1 swell foop */
  for(i=1; i<256; i++) CellMap[i]=CellMap[i-1]+512;
  memset(CellMap,0,256*512);
}

Note: this code was typed on the spot and has not been tested, so it may need
to be altered.

--- Aaron Ucko (ucko AT vax1 DOT rockhurst DOT edu; finger for PGP public key) -=- httyp!
-=*=-Just because you're paranoid doesn't mean they aren't out to get you.-=*=-
Geek code 2.1 [finger hayden AT vax1 DOT mankato DOT msus DOT edu for explanation]: 
 GCS/M/S d(-) H s g+ p? !au a-- w+ v+ C++(+++)>++++ U-(S+)>++++ P+ L>++ 3(-) 
 E-(----) !N>++ K- W(--) M-(--) V(--) po-(--) Y+(++) t(+) !5 j R G tv--(-) 
 b+++ !D(--) B--(---) e>++++(*) u++(@) h!() f(+) r-(--)>+++ n+(-) y?