claSS base publ void setA(int al)a=al; j void setb(int bl)(b=bl protected lI prTv class DERIVED public BASE publ void setc(int cl)c=cl; y void setD(int di)(d=dI; void set A(int al)a=al; / void set B(int bl)(b=bl; /V rotected pr Int private Int c 例 class BASE { public: void setA(int al) {a=al;} void setB(int bl) {b=bl;} protected: int b; private: int a; }; class DERIVED:public BASE { public: void setC(int cl) {c=cl;} void setD(int dl) {d=dl;} void set_A(int al) {a=al;} // void set_B(int bl) {b=bl;} // protected: int d; private: int c; };