Dutor

#include <iostream>
//~ #include <string>
 
using namespace std;
 
class B
{
public:
	virtual void foo()
	{
		cout<<"B::foo()"<<endl;
	}
};
 
class D1: public virtual B  //~ 公开继承
{
};
 
class D2: private virtual B  //~ 私有继承
{
};
 
class S: public D1, public D2
{
};
 
int 
main()
{
	S * pS = new S;
	D1 * pD1 = pS;
	D2 * pD2 = pS;
	pS->foo(); //~ OK, 存在一条访问路径B->D1->S
	pD1->foo();
	//pD2->foo(); //~ 'B::foo' : no accessible path to private member declared in virtual base 'D2'
	return 0;
}