有如下程序:#include<iostream>using namespace std;class B{public:Virtual void show(){cout<<
有如下程序: #include<iostream> using namespace std; class B{ public: Virtual void show(){cout<<“B”;} }; class D:publicB{ public: void show(){cout<<“D”;} }; void funl(B*ptr){ptr->show();} void{un2(B&ref){ref.show();} void
A.BBB
B.BBD
C.DBB
D.DBD