Re: Array Size Limits

[John Podesta <podesta at courant dot nyu dot edu>]

Jack,

   Yes, the program compiles but then I get a windows error message when
I run it.  It runs fine when I use gcc on the sun workstation.  I guess 
I'll try dynamic memory allocation as you suggested, but I can't 
understand why I  have a problem running the program on the PC but
not on the Sun.  Thanks for your help.

John Podesta

On Mon, 13 Dec 2004, Jack Liddle wrote:

> Not to sure what you mean by GCC won't run?  Does the program compile and
> then seg fault when you run it?
>
> I ran into a similar problem a few months ago (google for my name and
> you'll see the posts).
>
> Yes there is a limit to the size of your arrays can be when put on the
> stack.
>
> try instead
>
> double *A;
> A = malloc(500000*sizeof(double));
>
> this should declare the array in the main bulk of your memory.  Then
> access
> A as per usual.
>
> Jack Liddle
> Rudolph Peierls Centre for Theoretical Physics
> University Of Oxford
>
> On Mon, 13 Dec 2004, John Podesta wrote:
>
> > I installed MinGw on a pentiuim 4m laptop with 1G of RAM.
> > Apparently GCC won't run when I make my array size too big.
> > Is there some limit on the array size and is there any way for me
> > to set it up so I can have large arrays, e.g., A[500000].
> > Thanks.
> >
> > John Podesta
> > NASA GSFC