shared_ptr简单测试

#ifndef _SHARED_PTR_
#define _SHARED_PTR_

#include <iostream>          // std::cout std::fixed
#include <string>            // std::string
#include <memory>            // std::shared_ptr

using namespace std;

class ZOOM
{
public:
    ZOOM(string name, int id);
    ~ZOOM();
public:
    void showInfo();
public:
    string sName;
    int nId;
};

#endif







// shared_ptr.cpp : 定义控制台应用程序的入口点。
//


#include "stdafx.h"
#include "shared_ptr.h"


ZOOM::ZOOM(string name, int id)
{
sName = name;
nId = id;
}


ZOOM::~ZOOM()
{


}


void ZOOM::showInfo()
{
cout << "name: " << sName << "id: " << nId << endl;
}


void file_closer(FILE * f) 
{ 
if (NULL != f)
{
fclose(f); 
}
}


class FileCloser
{
public:
void operator() (FILE * pFile)
{
if (NULL != pFile)
{
fclose(pFile);
}
}
};


int _tmain(int argc, _TCHAR* argv[])
{
shared_ptr shpt(new ZOOM("xiaohai", 40805));
cout << "当前引用计数: " << shpt.use_count() << endl;
shpt->showInfo();


shared_ptr blank;
blank = shpt;
cout << "当前引用计数: " << shpt.use_count() << endl;
blank->showInfo();


{
shared_ptr blankCur = blank;
cout << "当前引用计数: " << shpt.use_count() << endl;
blankCur->showInfo();
}
cout << "当前引用计数: " << shpt.use_count() << endl;


FILE * fp = NULL;
if (0 == fopen_s(&fp, "log.txt", "w"))
{
shared_ptr spLog(fp, file_closer);	      ///< 方式一
shared_ptr spLogF(fp, FileCloser());	    ///< 方式二
cout << spLog.get() << endl;
cout << spLogF.get() << endl;
}


getchar();
return 0;
}