?? fig05_16.pl
字號:
#!/usr/bin/perl
# Fig. 5.16: fig05_16.pl
# Using logical operators in flow control.
print "Please enter a numerator: ";
chomp( $numerator = <STDIN> );
# bare block; redo continues from beginning of this block
{
print "Please enter a denominator: ";
chomp( $denominator = <STDIN> );
$denominator != 0 or
print "Cannot divide by zero\n" and redo;
}
print "\nThe result is ", $numerator / $denominator, "\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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