#!/usr/bin/perl
# Fig. 18.9: fig18_09.pl
# Demonstrating the open2 function.

use warnings;
use strict;
use IPC::Open2;

$| = 1;
my $command = 'perl fig18_10.pl';

open2( \*INPUT, \*OUTPUT, $command ) or 
   die( "Cannot open: $!" );

for ( 1 .. 20 ) {
   print( OUTPUT $_, "\n" );
   my $read = <INPUT>;
   print( $_, '  ', $read );
}

close( OUTPUT ) or die( "Cannot close OUTPUT: $!" );
close( INPUT ) or die( "Cannot close INPUT: $!" );



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