#include <iostream>using namespace std; template<typename E>class CLink; template<typename T>class Node{ friend class CLink<T>; public: /* 構造函數和析構函數一般不加類型參數 本類類中除了構造函數和析構函數以外 其它的地方都要加上類型參數 */ Node(T data = 0) { mdata = data; pnext = NULL; } ~Node(){} private: T mdata; Node<T>* pnext;}; template<typename T>class CLink{public: CLink() { phead = new Node<T>(); } void InsertHead(T data) { Node<T>* pNewNode = new Node<T>(data); pNewNode->pnext = phead->pnext; phead->pnext = pNewNode; }   void InsertTail(T data) { Node<T>* pNewNode = new Node<T>(data); Node<T>* pCur = phead; while(pCur->pnext != NULL) { pCur = pCur->pnext; } pCur->pnext = pNewNode; }  void Show() { Node<T>* pCur = phead->pnext; while (pCur != NULL) { cout << pCur->mdata << " "; pCur = pCur->pnext; } cout << endl; }  ~CLink() { Node<T>* pCur = phead; Node<T>* pNext = phead; while (pCur != NULL) { pNext = pCur->pnext; delete pCur; pCur = pNext; } phead = NULL; }  private: Node<T>* phead;}; int main(){ CLink<int> list1; CLink<int> list2;  for(int i = 0;i < 10;i++) { list1.InsertHead(i + 1); list2.InsertTail(i * 2); } cout << "list1:"; list1.Show();  cout << "list2:"; list2.Show();  return 0;}