单选题
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______ 。