An exercise set during on our Perl Programming course, when we're asking our trainees to write a subroutine. A young gentleman in Verona wishes to take a young lady out one evening, but her parents don't approve of the match. She lives in a castle set on a rocky outcrop, which is 12 metres tall and there's a convenient spot to rest the base of a ladder 5 metres away from the outcrop. Once onto the castle mound, the young gent (shall we call him Romeo?) needs a further ladder to reach the window of his beloved (she's called Juliet), which is a further 4 metres up. He can't get the ladder close, though, as there's a three metre wide rosebed and he has to put the ladder outside that. Write a Perl subroutine to calculate ladder lengths given the height and distance from the wall in each case, and write a piece of test code that makes two calls to this subroutine to work out the ladder lengths needed.

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Associated topic - Subroutines in Perl

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