Hi, I don't think that there is a real out-of-memory problem, but surely a problem with accuracy. Sorry, I am too tired to decode your program right now, but it looks a little bit C-ish to me. Something more terse and Perlish to start from might be: 

#!/usr/bin/perl

use strict;

chomp (my $equation = <DATA>);
my @stack;

foreach ( split(/\s*,\s*/, $equation) ) {

  push(@stack,$_), next if /\d+/;
  die "stack underrun" if @stack < 2;

  my ($val1, $val2) = (pop(@stack), pop(@stack));
  push(@stack, $val1 + $val2), next if $_ eq '+';
  push(@stack, $val1 * $val2), next if $_ eq 'x';

  die "undef. operator ($_)";
}

print "Result (stack): ", join(", ", @stack), "\n";


__DATA__
1,2,3,4,+,5,+,x,6, ......  x,x,x,x,x,9164,x,+,9165,9166,91    <--- you
+r input as a single line

Result (stack): 1, 144, 1.9792773969506e+27, 6.22437334578068e+26, 5.7
+7209920038837e+273, 8966, 4.97957520221034e+261, 9165, 9166, 91

[download]
Seems that the equation is not complete? Furthermore, as you can see, the usual built-in precision might not be sufficient for your purpose. So you should have a look at e.g. Math::BigInt too.

In reply to Re: Out of memory. by Perlbotics
in thread Out of memory. by dneedles

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