#ifndef SUMVISITOR_H
#define SUMVISITOR_H
#include "btnodevisitor.h"


class sumvisitor: public btNodeVisitor<int,int,int>
{
public:

  int visit(binTreeNode<int> *p, const int& x)
  {
    int y = x;
    if (p == 0) {
      return y;
    }
    y += p->left->accept(*this, 0);
    y += p->data;
    y += p->right->accept(*this, 0);
    return y;
  }
};
#endif