?? fig18_14.pl
字號(hào):
#!/usr/bin/perl
# Fig. 18.14: fig18_14.pl
# Demonstrates using %SIG to define our own signal handlers.
use warnings;
use strict;
my $count = 3;
$| = 1;
$SIG{ 'INT' } = \&stop;
while ( $count ) {
print( "Hooray!" );
print( "\n" );
sleep( 1 );
}
sub stop
{
$SIG{ 'INT' } = \&stop;
$count--;
print( "$count\n" );
unless ( $count ) {
print( "Sorry, I did not want to stop...\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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