使用C++标准类库的智能指针(源代码)

#include "stdafx.h"
#include <iostream>
#include <string>
#include <cstring>
#include <memory>
using namespace std;

class CMyStr
{
public:
	CMyStr(const char* pstr)
	{
		cout << "CMyStr::CMyStr()" << endl;

		m_pData = NULL;
		if (NULL == pstr)
		{			
			cout << "param is null!";
			return;
		}

		int nLen = strlen(pstr) + 1;
		m_pData = new char[nLen];
		if (NULL == m_pData)
		{
			cout << "get memory failed..." << endl;
			return;
		}

		strncpy(m_pData, pstr, nLen);
	}

	~CMyStr()
	{
		cout << "CMyStr::~CMyStr()" << endl;
		if (NULL != m_pData)
		{
			delete[] m_pData;
			m_pData = NULL;
		}
	}

	const char* c_str()
	{
		return m_pData;
	}

private:
	char*	m_pData;
};

int main()
{
	auto_ptr<CMyStr> pStr(new CMyStr("hello, andylin!"));
	cout << pStr->c_str() << endl;

	auto_ptr<string> pstr2(new string("I love my baby so much!"));
	cout << pstr2->c_str() << endl;

	return 0;
}