C++派生類對象模型

 

#include <iostream>
using namespace std;
class base
{
	public:
	base(){}
	virtual ~base(){}
	int get()const{return num;}
	private:
	int num;
};
class base1
{
	public:
	base1(){}
	virtual ~base1(){}
	private:
	int helthy;
};
class base2
{
	public:
	base2(){}
	virtual ~base2(){}
	private:
	int aa;
};
class derived:public base,public base1,public base2
{
	public:
	derived(){}
	~derived(){}
	private:
	int id;
};


int main()
{
	base *pb = new derived;
	cout << pb << endl;
	int *p = (int*)pb;
	p[1] = 5;
	cout << pb->get() << endl;
	delete pb;
	return 0;
}
/**multiple inheritance class object model
|--------| <<---- this(base,derived)   base *pb = new derived;derived md1;
| base   |
|--------| <<---- this(base1) base1 *pb1 = new derived;
| base1  |
|--------| <<---- this(base2) base2 *pb2 = new derived;
| base2  |
|--------| ---->> derived class object model
| derived|
|--------|
**/