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


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

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