如果不能使用多态机制,那么通过基类的指针虽然可以指向派生类对象,但是只能访问从基数继
#include
using namespace std;
class Base{
public:
Void print(){cout<< ‘B’;}};
class Derived: public Base{
public
void print(){cout<< ‘D’;}}
int main()
{
Derived*pd=new Dreived);
Base*pb=pd;
pb->print();
pd->print();
delete pd;
return 0;
}