有如下程序: #include<iostream> using namespace std; class Base public: void funl( )cout<< Base n ; virtual void fun2( )cout<< Base n ; ; class Derived:public Base public: void funl( )eout<< Derived n ; void fun2( )cout<< Derived n ; ; void f(Base &B) b.funl( );b.fun2( ); int main( ) Derived obj; f(obj); return 0; 程序的输出结果是
A.Base
Base
B.Base
Derived
C.Derived
Base
D.Derived
Derived