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
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