vptree default constructor/vptree reinitialization

[JECBello]

Hello! I am working on an application requiring a vptree. I only want to initialize the vptree once within a particular method and then use the tree repeatedly within another method. This requires that I declare the vptree within the class's definition. This in turn requires that the vptree have a default constructor. I was wondering if it would be possible to implement this.

If not, is there any way you can include a method within the vptree class definition which allows the tree to be reinitialized using a different array?

Thank you!