?? fig06_17.pl
字號:
#!usr/bin/perl
#Fig 6.17: fig06_17.pl
# Demonstrating packages.
# make FirstPackage.pm available to this program
require FirstPackage;
# define a package global variable in this program
our $variable = "happy";
# display values from the main package
print "From main package:\n";
print "\$variable = $variable\n";
print "\$main::variable = $main::variable\n";
# display values from FirstPackage
print "\nFrom FirstPackage:\n";
print "\$FirstPackage::variable = $FirstPackage::variable\n";
print "\$FirstPackage::secret = $FirstPackage::secret\n";
# use a subroutine in FirstPackage to display the
# values of the variables in that package
FirstPackage::displayFirstPackageVariables();
###########################################################################
# (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. #
###########################################################################
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