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Composite Trees and Visitors

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Hi, I''m new to design patterns and I''m trying to design a simple pretty- printer for a tree structure. I already have a composite structure for my trees and was thinking of printing with a visitor system. I''d like the output to resemble the following: A +-B | +-Q +-E | +-T | | +-X | | +-Y | | +-Z | +-O +-W So far all I can get is the ordering: A B Q E T X Y Z O W Does anyone here have an idea of how I should proceed? Many Thanks <Fish>{

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I think you need to pass in an extra numeric parameter, which tracks how ''deep'' you are in the tree. Everytime you print the sub-elements of an element, increase it by one. When you print, use the number to say how many leading +--- to print.

-* Nostik
KQ lives

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