单选题
有如下程序:
#include
using namespace std;
class Base{
public:
virtual void Show(){cout<<'B';}
};
class Derived:public Base{
public:
void Show(){cout<<'D';}
};
int main(){
Base *p1=new Derived;
Derived *p2=new Derived;
p1->Show();
p2->Show();
delete p1;
delete p2;
return 0;
}
运行这个程序的输出结果是