C++ダミーテーブルアドレスオフセット

#include 
using namespace std;

class Base {
public:
	Base() {
		cout << "Base  " << endl;
	}
	virtual ~Base() {
		cout << "Base   " << endl;
	}
	virtual void f1() {
		cout << "Base::f1()" << endl;
	}
	void f2() {
		cout << "Base::f2()" << endl;
	}
	virtual void f3() {
		cout << "Base::f3()" << endl;
		//cout << data << endl;	
	}
	int data = 5;
	static void fn() {
	}
};

int main() {
	cout << sizeof(Base) << endl;

	Base* p1 = new Base();
	Base* p2 = new Base();
	cout << p1->fn << endl;		//               
	cout << Base::fn << endl;	//               

//	cout << &Base::f1 << endl;	//     void(__thiscall A::*)()     bool  
	printf("Base::f1()  :%p
", &Base::f1);
	printf("Base::f1()  :%p
", &Base::f1);
	printf("Base::f2()  :%p
", &Base::f2);
	printf("Base::fn()  :%p
", &Base::fn);

	cout << "p1    : " << (p1) << endl;
	cout << "p1       : " << (int*)(p1) << endl;
	cout << "p1      1      : " << (int*)*(int*)(p1) << endl;
	cout << "p1      2      : " << ((int*)*(int*)(p1)+1) << endl;
	cout << "p1      3      : " << ((int*)*(int*)(p1)+2) << endl;
	cout << "p1      4      : " << ((int*)*(int*)(p1)+3) << endl;


	cout << "p2    : " << (p2) << endl;
	cout << "p2       : " << (int*)(p2) << endl;
	cout << "p2      1      : " << (int*)*(int*)(p2) << endl;
	cout << "p2      2      : " << ((int*)*(int*)(p2)+1) << endl;
	cout << "p2      3      : " << ((int*)*(int*)(p2)+2) << endl;
	cout << "p2      4      : " << ((int*)*(int*)(p2)+3) << endl;

	cout << endl;

	typedef void(*PFUN)();

	PFUN pfBase = (PFUN) * ((int*)*(int*)p1 + 0);	//   
	PFUN pf1 = (PFUN) * ((int*)*(int*)p1 + 1);	// f1
	PFUN pf2 = (PFUN) * ((int*)*(int*)p1 + 2);	// f2
	PFUN pfnull = (PFUN) * ((int*)*(int*)p1 + 3);	//0x00
	pf1();
	pf2();	//            ，       。      。 this    。

}

C/C++取得関数アドレス