有下列程序: #include<iosteram.h> using namespace std; class Base { public: Base(){cout<<"B
有下列程序: #include<iosteram.h> using namespace std; class Base { public: Base(){cout<<"BB"; f(); } void f(){cout<<"Bf";} }; class Derived:public Base { public: Derived(){cout<<"D
A.BBBfDD
B.BBDfDDDf
C.DD
D.DDBBBf