gv.rb

Graphviz-Output.rb

 def gv
    g = ""
    unless @left.nil?
      g += @left.gv
      g += "\"#{@value}\" -> \"#{@left.value}\";"
    end
    unless @right.nil?
      g += @right.gv
      g += "\"#{@value}\" -> \"#{@right.value}\";"
    end
    if @right.nil? && @left.nil?
      return "\"#{@value}\""
    end
    return g
  end