[C++知识库]C++ this关键字_this的多态

留个坑。

class Base
{
public:
    int a = 0x55;
    void destroy() 
    { 
    	cout << "destroy: " << hex <<  this << dec << endl;  
    	this->show(); 
    	delete  this; 
    }
    virtual void show() { cout << "Base: show" << endl; }
    virtual ~Base() { cout << "Base: " << hex <<  this << dec << endl;  }
};

class d1 : public Base
{
public:
    int b = 0x66;
    virtual void show() { cout << "d1: show" << endl; }
    virtual ~d1() { cout << "d1: " << hex <<  this << dec << endl; }
};

class d2 : public d1
{
public:
    int c= 0x77;
    virtual void show() { cout << "d2: show" << endl; }
    virtual ~d2() { cout << "d2: " << hex <<  this << dec << endl; }
};

int main()
{
    d2* p = new d2;
    cout << "d2: " << hex <<  p << dec << endl;
    p->destroy();
    return 0;
}