fig06_14.pl

来自「PERL语言资料 可以用于PERL程序设计」· PL 代码 · 共 45 行

#!/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 );
   }
}



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