虚函数背后的秘密2

#include <iostream>
using namespace std;

class Base
{
public:
 Base()
 {
  cout << "In Base" << endl;
  cout << "This Pointer = " << (int*) this << endl;
  cout << endl;
 }
 virtual void f()
 {
  cout << "Base::f" << endl;
 }
};

class Drive: public Base
{
public:
 Drive()
 {
  cout << "In Drive" << endl;
  cout << "This Pointer = " << (int*) this << endl;
  cout << endl;
 }
 virtual void f()
 {
  cout << "Drive::f" << endl;
 }
};

int main()
{
 Drive d;
 cout << "In Main" << endl;
 cout << "In Main = " << (int*) &d << endl;
 return 0;
}

In Base
This Pointer = 0xbfffe47c

In Drive
This Pointer = 0xbfffe47c

In Main
In Main = 0xbfffe47c