?? fig14_15.pl
字號:
#!/usr/bin/perl
# Fig. 14.15: fig14_15.pl
# Using the UNIVERSAL base class methods.
use strict;
use warnings;
use Employee2;
use Hourly2;
use Boss;
my %people = ( employee => new Employee2,
hourly => new Hourly2,
boss => new Boss );
foreach my $key ( keys( %people ) ) {
my $object = $people{ $key };
print( "$key is a employee2\n" )
if $object->isa( 'Employee2' );
print( "$key is a hourly2\n" ) if $object->isa( 'Hourly2' );
print( "$key is a boss\n" ) if $object->isa( 'Boss' );
print( "$key can write\n" ) if $object->can( 'write' );
print( "$key can rate\n" ) if $object->can( 'rate' );
print( "$key can title\n" ) if $object->can( 'title' );
print( "\n" );
}
###########################################################################
# (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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