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diff --git a/Bachelor/Prog2/Codebeispiele/6_ch17/fig17_17_19/Treenode.h b/Bachelor/Prog2/Codebeispiele/6_ch17/fig17_17_19/Treenode.h
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+// Fig. 17.17: treenode.h
+// Template TreeNode class definition.
+#ifndef TREENODE_H
+#define TREENODE_H
+
+// forward declaration of class Tree
+template< class NODETYPE > class Tree;  
+
+template< class NODETYPE >
+class TreeNode {
+   friend class Tree< NODETYPE >;
+
+public:
+
+   // constructor
+   TreeNode( const NODETYPE &d )   
+      : leftPtr( 0 ), 
+        data( d ), 
+        rightPtr( 0 ) 
+   { 
+      // empty body 
+   
+   } // end TreeNode constructor
+
+   // return copy of node's data
+   NODETYPE getData() const 
+   { 
+      return data; 
+
+   } // end getData function
+
+private:
+   TreeNode< NODETYPE > *leftPtr;  // pointer to left subtree
+   NODETYPE data;
+   TreeNode< NODETYPE > *rightPtr; // pointer to right subtree
+
+}; // end class TreeNode
+
+#endif
+
+/**************************************************************************
+ * (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice      *
+ * Hall. All Rights Reserved.                                             *
+ *                                                                        *
+ * DISCLAIMER: The authors and publisher of this book have used their     *
+ * best efforts in preparing the book. These efforts include the          *
+ * development, research, and testing of the theories and programs        *
+ * to determine their effectiveness. The authors and publisher make       *
+ * no warranty of any kind, expressed or implied, with regard to these    *
+ * programs or to the documentation contained in these books. The authors *
+ * and publisher shall not be liable in any event for incidental or       *
+ * consequential damages in connection with, or arising out of, the       *
+ * furnishing, performance, or use of these programs.                     *
+ *************************************************************************/
+\ No newline at end of file