C++之多继承

#include <iostream>

using namespace std ; 

class AA
{
	public:
		int a ; 
		void Say_hello(void)	
		{
			cout << "this is AA " << endl ; 	
		}
};

class BB
{
	public:
		int b ; 
		void Say_hello(void)
		{
			cout << "this is BB " << endl ; 
		}
};

//多继承 
class CC  : public AA , public BB
{
	public:
		int d ; 
		void Say_hello(void)
		{
			cout << "this is CC " << endl ; 
		}
};

int main(void)
{
	CC  aa ; 
	aa.Say_hello();
	aa.AA::Say_hello();
	aa.BB::Say_hello();
	aa.CC::Say_hello();

	cout << "Size AA : " << sizeof(AA) << endl ; 
	cout << "Size BB : " << sizeof(BB) << endl ; 
	cout << "Size CC : " << sizeof(CC) << endl ; 
	
}