C++设计一个不能被继承的类

1. 方法一

将构造函数和析构函数设置为私有函数，重新定义公有的静态函数来创建和释放类。

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

class SealedClass1
{
public:
    static SealedClass1* GetInstance()
    {
        return new SealedClass1();
    }

    static void DeleteInstance(SealedClass1 *pInstance)
    {
        delete pInstance;
    }
private:
    SealedClass1(){}
    ~SealedClass1(){}
};

int _tmain(int argc, _TCHAR* argv[])
{
    return ;
}

2. 方法二

template <typename T>
class MakeSealed
{
    friend T;

private:
    MakeSealed(){}
    ~MakeSealed(){}
};

class SealedClass2 :virtual public MakeSealed<SealedClass2>
{
public:
    SealedClass2() {}
    ~SealedClass2(){}
};