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  1. or download this
     packing float as network long:
 +-----+    +-----------+    +------------+
...
 +------------+    +-----------+    +-----+
 |network long|--->|native long|--->|float|
 +------------+    +-----------+    +-----+
  2. or download this
    use strict;
use IO::File;
...
  my $float = unpack 'f', pack 'L', unpack 'N', $network_long;
  printf "%0.4f\n", $float;
}
  3. or download this
    On SUN: float->network_long->disk
On WindowsXP: disk->network_long->float
  4. or download this
    On WindowsXP: float->network_long->disk
On SUN: disk->network_long->float