下列虚基类的声明中,正确的是()
A.正确答案Bclass virtual B:public A
B.class B:virtual public A
C.class B:public A virtual
D.virtual class B:public A
下列虚基类的声明中,正确的是()
下列虚基类的声明中,正确的是()
A.正确答案Bclass virtual B:public A
B.class B:virtual public A
C.class B:public A virtual
D.virtual class B:public A