This is the mail archive of the
gcc-help@gcc.gnu.org
mailing list for the GCC project.
Re: how to use malloc to reserve space for 1 billion floats
On 28/08/12 05:58, Anna Sidera wrote:
> The system has 10 giga byte RAM.
>
> The command:
> uname -a
> gives the following output:
> Linux olympus 2.6.26-2-amd64 #1 SMP Wed Aug 19 22:33:18 UTC 2009 x86_64 GNU/Linux
> I think this means that the system is 64 bit.
It does.
> So you think that the command:
> int myvariable = 1000;
> float *myarray = malloc(pow(myvariable,3)*sizeof(float));
> will work if pow(myvariable,3) is smaller than 2 billion?
>
> Many Thanks,
> Anna
Yes. (the 2+e9 limit being roughly for the 7,45GB needed, not due to
malloc, to which you
could ask for even bigger amounts )