![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-53/ti_inject-812ce.png)
有如下类声明: class MyBASE { int k public: void set(int n){k=n} int get()const{return k} } class MyDERIVED:protected MyBASE { protected: int j public: void set(int m, int n) {MyBASE::set(m)j=n} int get()const{return MyBASE::get()+j} } 则类MyDERIVED中保护的数据成员和成员函数的个数是