#include <iostream>using namespace std;class Product{public:    virtual ~Product() {}    virtual void Action()=0;};class ConcreteProduct : public Product{public:    ConcreteProduct() {}    ~ConcreteProduct() {}    void Action()    {        cout<<"ConcreteProduct::Action"<<endl;    }};class SaleProxy : public Product{public:    SaleProxy()    {        m_pProduct = new ConcreteProduct;    }    ~SaleProxy()    {        delete m_pProduct;        m_pProduct = NULL;    }    void Action()    {        cout<<"SaleProxy::";        m_pProduct->Action();    }private:    Product* m_pProduct;};int main(int argc, char *argv[]){    ConcreteProduct realProduct;    realProduct.Action();    SaleProxy proxy;    proxy.Action();        return 0;}