main.cpp

C++北航内部教学

#include <iostream>

using namespace std;

class Node
{
  private: 
    enum DataType{INT,CHR,STR};//可以被接受的类型 
    DataType _myType;
    void* _data;
    static Node *_ptr;//为什么用static 
    Node *_next;
  public:
    Node(int element)//初始化为整型的节点 
    {
      _myType = INT;
      _data = &element;
                                                         
    };
    Node(char element)//初始化为字符型节点 
    {
      _myType = CHR;
      _data = &element;
        
    };
    ~Node();
    void print()
    {
      if (_myType==INT) 
      {                        
        cout << *(int*)_data << endl;
      }  
      else if (_myType==CHR) 
      {
        cout << *(char*)_data << endl;
      }  
      else if (_myType==STR) 
      {
        cout << *(char*)_data;
      };  
    }; 
    void setNext(Node *next)
    {
      _next = next;  
    };    
};

int main(int argc, char *argv[])
{

  int tmp=2334;
  //int int_element = 29;
  //char char_element = 'a';
  Node * ip = new Node(3333);
  Node * cp = new Node('K');
  ip->setNext(cp);
  ip->print();
  cp->print();
  cin >> tmp;
  	
  return 0;
}