【单选题】Courtesy is as important in speaking over the phone as in talking to people face to face. Therefore , it is essential to know the etiquette of calling, especially in the business environment . essenti...
【单选题】类定义如下。 class A{ public: virtual void func1( ){ } void fun2( ){ } }; class B:public A{ public: void func1( ) {cout<<”class B func1”<
A.
A::func2( )和B::func1( )都是虚函数
B.
A::func2( )和B::func1( )都不是虚函数
C.
B::func1( )是虚函数,而A::func2( )不是虚函数
D.
B::func1( )不是虚函数,而A::func2( )是虚函数
【单选题】对于类定义 class A{ public:virtual void func1( ){ } void func2( ){ } }; class B:public A{ public:void func1( ){cout< virtual void func2( ){cout< };下面正确的叙述是( )
A.
A::func2( )和B::func1( )都是虚函数
B.
A::func2( )和B::func1( )都不是虚函数
C.
B::func1( )是虚函数,而A::func2( )不是虚函数
D.
B::func1( )不是虚函数,而A::func2( )
【单选题】Courtesy is as important in speaking over the phone as in talking to people face to face. Therefore, it is essential to know the etiquette of calling, especially in the business environment.