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Romeo and Julie - solution
Subroutines in Perl example from a Well House Consultants training course
More on Subroutines in Perl [link]
Source code: romeo Module: P209
=head1 Romeo and Julie - solution Romeo wants to rescue his girlfriend Julie from her evil stepdad's home, where she has been locked in her room ... high on the castle mound in far, far, away. Julie's room is 4 metres up on the first floor, and the only stable ground below it is 3 metres from the wall. The castle mound in 12 metres tall and the moat makes it impractical to get the base of the ladder nearer that 5 metres from the mound. Romeo is going to buy two ladders from B and Q to reach Julie. Write a program to work out how long the ladders should be. =cut use bandq; $h = "Romeo"; $w = "Julie"; # Oh heck - I don't know the algorithm so I'll # hide it within a "sub" .... $lad1 = bandq::ladlen(4,3); # When called with a list, also returns a # stability factor. ($lad2,$sf) = bandq::ladlen(12,5); print "$h must buy ladders $lad1 and $lad2" . " m to get to $w\n"; print "Stability factor is $sf\n"; # Following line waits for keyboard input on # a windows box so that the user gets a chance # to see the results before the flash away! $wait = <STDIN> if ($^O =~ /^MS/); Learn about this subject
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