fig18_09.pl

PERL语言资料 可以用于PERL程序设计

#!/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: $!" );



###########################################################################
#  (C) Copyright 2001 by Deitel & Associates, Inc. and Prentice Hall.     #
#  All Rights Reserved.                                                   #
#                                                                         #
#  DISCLAIMER: The authors and publisher of this book have used their     #
#  best efforts in preparing the book. These efforts include the          #
#  development, research, and testing of the theories and programs        #
#  to determine their effectiveness. The authors and publisher make       #
#  no warranty of any kind, expressed or implied, with regard to these    #
#  programs or to the documentation contained in these books. The authors #
#  and publisher shall not be liable in any event for incidental or       #
#  consequential damages in connection with, or arising out of, the       #
#  furnishing, performance, or use of these programs.                     #
###########################################################################