填空题

下列程序的运行结果是______。
#include＜iostream.h＞
class Base
public:
virtual void func(int i)cout＜＜"class Base:"＜＜i＜＜end1;)
;
class Derived: public Base
public:
void func(double d)cout＜＜"class Derived:"＜＜d＜＜endl;
; void main( )
Base a,*p=a;
Derived b;
p=&b;
(*p).func(3.3);