tree.h

ThinkingC++中文版

//: C13:Tree.h
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 2000
// Copyright notice in Copyright.txt
#ifndef TREE_H
#define TREE_H
#include <iostream>

class Tree {
  int height;
public:
  Tree(int treeHeight) : height(treeHeight) {}
  ~Tree() { std::cout << "*"; }
  friend std::ostream&
  operator<<(std::ostream& os, const Tree* t) {
    return os << "Tree height is: "
              << t->height << std::endl;
  }
}; 
#endif // TREE_H ///:~