有如下类声明:class Base{protected:int amount;public:Base(int n=0):araount(n){ }int getAmou
有如下类声明: class Base{ protected: int amount; public: Base(int n=0):araount(n){ } int getAmount()const{retum amount;} }; class Derived:public Base{ protected; int value; public: Derived(int m,int n):value(n1),Base(n){ } int getData()const{return value+amount;} }; 已知x是一个Derived对象,则下列表达式中正确的是
A.x.value+x.getAmount()
B.x.getData()-x.getAmount()
C.x.getData()-x.amount
D.x.value+x.amount