有如下程序：

#include

using namespace std;

class Base

{

public:

void funl(){cout$amp;virtual void fun2(){cout$amp;};

class Derived:public Base

{

public:

void funl(){cout$amp;void fun2(){cout$amp;};

void f(Base &

B ． {b.funl();b.fun2();}&, lt;, /P>

int main()

{

Derived obj;

f(obj);

return 0;

}

执行这个程序的输出结果是

A ． Base Base

B ． Base Derived

C ． Derived Base

D ． Derived Derived