C++模板类的用法实例

本文实例讲述了C++中模板类的用法，分享给大家供大家参考。具体方法如下：

//#include "StdAfx.h
#ifndef __AFXTLS_H__
#define __AFXTLS_H__
#include <Windows.h>
class CSimpleList
{
public:
  CSimpleList(int nNextOffset=0);
  void Construct(int nNextOffset);
  //接口
  BOOL IsEmpty() const;
  void AddHead(void *p);
  void RemoveAll();
  void* GetHead() const;
  void* GetNext(void* preElement) const;
  BOOL Remove(void* p); 

  //为实现接口所需的成员
  void  *m_pHead;
  size_t m_nextOffset;
  void** GetNextPtr(void* preElement) const;
}; 

//类的内联函数
inline CSimpleList::CSimpleList(int nNextOffset)
  {m_pHead = NULL; m_nextOffset = nNextOffset;  } 

inline void CSimpleList::Construct(int nNextOffset)
  {m_nextOffset = nNextOffset;  } 

inline BOOL CSimpleList::IsEmpty() const
{
  return m_pHead==NULL;
}
//inline void AddHead(void *p)
//{
//
//}
inline void CSimpleList::RemoveAll()
{
  m_pHead = NULL;
}
inline void* CSimpleList::GetHead() const
{
  return m_pHead;
}
inline void* CSimpleList::GetNext(void* preElement) const
{
  return *GetNextPtr(preElement);
}
//inline BOOL CSimpleList::Remove(void* p)
//{
//
//}
inline void**  CSimpleList::GetNextPtr(void* preElement) const
{
  return (void**)((BYTE*)preElement+m_nextOffset);
} 

//定义模板类
template<class TYPE> 

class CTypedSimpleList:public CSimpleList
{
public:
  CTypedSimpleList(int nNextOffset=0)
    :CSimpleList(nNextOffset){}
  void Construct(int nNextOffset);
  //接口
  void AddHead(TYPE p)
  {
    CSimpleList::AddHead((void*)p);
  }
  TYPE GetHead()
  {
    return (TYPE)CSimpleList::GetHead();
  }
  TYPE GetNext(TYPE preElement)
  {
    return (TYPE)CSimpleList::GetNext((void*)preElement);
  }
  BOOL Remove(TYPE p)
  {
    return CSimpleList::Remove(p);
  } 

  //直接引用类的对象会调用此函数
  operator TYPE()
  {
    return (TYPE)CSimpleList::GetHead();
  }
};
#endif

模板类的用法：

//测试模板类
  MyThreadData* pTempData;
  CTypedSimpleList<MyThreadData*> templateList;
  list.Construct(offsetof(MyThreadData, pNext));
  //向链表中加数据
  for (int i=100;i<110;i++)
  {
    pTempData = new MyThreadData;
    pTempData->nShortData = i;
    templateList.AddHead(pTempData);
  } 

  //遍历链表，释放对象占用的资源
  pTempData = templateList;
  while (pTempData)
  {
    MyThreadData* pNextTempData = pTempData->pNext;
    printf("TemplateDateList=%d\n",pTempData->nShortData);
    delete pTempData;
    pTempData = pNextTempData;
  }

希望本文所述对大家的C++程序设计有所帮助。