#include <iostream.h>
class A
{
private:	int privA;
protected:  int protA;
public:		int pubA;
};
class B : public A
{
public:
	void fn()
	{
		int a;
		//a = privA;	//錯誤：不可訪問 
		a = protA;		//有效 
		a = pubA;		//有效 
    }
};
void main()
{
	A objA;
	B objB;
	cout << "sizeof(objA) = " << sizeof(objA) << "\n";
	cout << "sizeof(objB) = " << sizeof(objB) << "\n";
}