Hi BrowserUK and thank you for your fast answer :-)

Here is my code for the file creation.

open(OUT,'>'.$fil) or die $!;
binmode OUT;
for $i(1 .. 10000){
 $lat=int(rand(20000))+440000;
 $lon=int(rand(10000))+20000;
 $typ=chr(31);
 $cod=pack('l>l>C',$lat,$lon,$typ);
 print OUT $cod;
}
close(OUT);

[download]
And here is my code for the read and comparison:

$lah=pack('l>',$lah);
$lab=pack('l>',$lab);
$loh=pack('l>',$loh);
$lob=pack('l>',$lob);
open(IN,"<ch";
@fil=stat(IN);
$num=$fil[7]/9;
binmode(IN);
for(1 .. $num){
 read(IN,$lat,4);
 read(IN,$lon,4);
 read(IN,$pyt,1);
 if(($lat lt $lah) && ($lat gt $lab) && ($lon lt $loh) && ($lon gt $lo
+b)){
  print "OK";
 }
}

[download]

But it is never OK :-(

In reply to Re^2: comparison of packed signed integers by gerleu
in thread comparison of packed signed integers by gerleu

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