Not knowing what kind of system you're using, I'd suggest there's a mismatch between the tcp protocol you're trying to use and the type of socket you want to open; tcp uses SOCK_STREAM (third argument to the socket call) and I bet the number you have there doesn't correspond to that type. I'd play it safe and do the call the portable way, using the constants the Socket module defines:

use strict;
use Socket;

my $proto = getprotobyname('tcp');
socket(SOCKET, PF_INET, SOCK_STREAM, $proto)
 or die "Can't open socket: $!\n";
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HTH

perl -e 'print "How sweet does a rose smell? "; chomp $n = <STDIN>; $r
+ose = "smells sweet to degree $n"; *other_name = *rose; print "$other
+_name\n"'
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Thank you very much that worked ! I appreciate your help. Thanks a lot