# File Warshall.rb, line 176 def to_s return "{}" if @basis == nil str = "Basismenge: \n " + @basis.to_s + "\n" + "Adjazenzliste (Vorgaenger): \n " + @vor.to_s + "\n"+ "Adjazenzliste (Nachfolger): \n " + @nach.to_s + "\n \n" return str end