Converting Hexadecimal to Decimal notation and vice-versa

[Anonymous Monk]

Hi, I have a hexadecimal number as below

  0x000102030405060708090a0b0c0d0e0f;

I was trying to do

#!/usr/bin/perl
use strict;
use warnings;
my $x_dec = Math::BigInt->from_hex("0x000102030405060708090a0b0c0d0e0f
+");

print $x,"\n";

But the above code does not work. I get an error message saying integer over flow.
Are there any other alternatives?
--Bella

[Not_a_Number]

It works for me (once I've fixed the errors in your posted code):

use strict;
use warnings;

use Math::BigInt;   # Missing from your posted code

my $x_dec = Math::BigInt->from_hex("0x000102030405060708090a0b0c0d0e0f
+");

print $x_dec, "\n"; # Not $x, as in your posted code

# Output:
5233100606242806050955395731361295

[Anonymous Monk]

Hi, thanks.
We had an older version of Math::BigInt and that is why it seems it could not locate method from_hex.
How do I convert a huge integer to hexadecimal using Math::BigInt?

[almut]

How do I convert a huge integer to hexadecimal

->as_hex()

[stonecolddevin]

I think pack could take care of this as well.

UPDATE: Here's an example¹:

$int = unpack("N", pack("H8", substr("0" x 8 . "DEADBEEF", -8)));

$dec = sprintf("%d", $int);

Where DEADBEEF is your hex number.

¹http://perl.active-venture.com/pod/perlfaq4-datanumber.html

[AnomalousMonk]

But how does this apply to the big integers of the OP?

>perl -wMstrict -le
"my $int = unpack('N', pack('H8', '102030405060708090a0b0c0d0e0f'));
 my $dec = sprintf('%d', $int);
 print $dec;
"
270544960

[stonecolddevin]

Specify a different template for sprintf?