有如下程序：

#include

using namespace std;

class ONE

{

public:

virtual void f(){cout$amp;};

class TWO:public ONE

{

public:

TWO(){cout$amp;};

class THREE:public TWO

{

public:

virtual void f(){TWO::f(); cout$amp;};

int main()

{

ONE aa, *p;

TWO bb;

THREE cc;

p = &cc;

p->f();

return 0;

}

执行上面程序的输出是 【 11 】 。