For example, srand 0;print int(rand(99)) for 0..9 must always yield 023647263525973192

This outputs correctly for me: 
use warnings;
use strict;

my_srand(0);
print int(my_rand(99)) for 0..9;

sub my_srand {
  use Win32::API;
  my $srand = Win32::API::More->new(
    'msvcrt', 'void srand(unsigned int seed)'
  ) or die "Error: ".Win32::FormatMessage(Win32::GetLastError());
  $srand->Call($_[0]);
}

sub my_rand {
  my $rand = Win32::API::More->new(
    'msvcrt', 'int rand()'
  ) or die "Error: ".Win32::FormatMessage(Win32::GetLastError());
  return int(($rand->Call()) * $_[0] / 32767);
}

[download]
It outputs 023647263525973192
The only problem is that it calls my_srand and my_rand, but I gather that the requirement is that it instead call srand and rand.
I don't know how/if the builtin srand and rand can be overridden to point to my_srand and my_rand.

Cheers,
Rob

In reply to Re^3: Old random number generator by syphilis
in thread Old random number generator by Pascal666

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