下面程序的运行结果是()。 #include<iostream.h> class base{ protected: int a; public
下面程序的运行结果是()。 #include<iostream.h> class base{ protected: int a; public: base{cout<<”0”;} }; class basel:virtual base{ public: basel{cout<<”1”;} }; class base2:virtual base i public: base2{cout<<”2”;} }; class derived:public basel,public base2{ public: derived{cout<<”3”;} }; void main derived obj; cout<<endl:
A.0123
B.3120
C.0312
D.3012