?? fig06_14.pl
字號:
#!/usr/bin/perl
# Fig 6.14: fig06_14.pl
# Recursive fibonacci function.
@sampleValues = (0, 1, 2, 3, 4, 5, 6, 10, 20, 30, 35);
# Calculate and print the fibonacci value of all the above values
foreach ( @sampleValues ) {
print "fibonacci( $_ ) = ", fibonacci( $_ ), "\n";
}
# fibonacci recursively calculates the fibonacci number
# of its integer argument
sub fibonacci
{
my $number = shift; # get the first argument
if ( $number == 0 or $number == 1 ) { # base case
return $number;
}
else { # recursive step
return fibonacci( $number - 1 ) +
fibonacci( $number - 2 );
}
}
###########################################################################
# (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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