class Employee
{
private:		int privA;
protected:		int protA;
public:			int pubA;
}; 
class Manager : public Employee
{	
public:
	void fn()
	{
		int a;
		//a = privA;	//錯誤：不可訪問
		a = protA;	//有效
		a = pubA;	//有效
	}
};
void main()
{
	Employee emp;		//基類對象
	//emp.privA = 1;	//錯誤：不可訪問
	//emp.protA = 1;	//錯誤：不可訪問
	emp.pubA = 1;		//有效
	Manager mgr;		//派生類對象
	//mgr.privA = 1;	//錯誤：不可訪問
	//mgr.protA = 1;	//錯誤：不可訪問
	mgr.pubA = 1;		//有效
}