int getxo constreturnx (续) int geto constreturn y; protected: int x private int y, class B publIc: void setzlint czc int getz const return protected: it z; class c: public a, private b public void setcz(int cset(c); int getczo constreturnz; 3 int getsumo const(return x+gety o+z,int getx() const{return x;} int gety() const{return y;} protected: int x; private: int y; }; class B { public: void setz(int c){z=c;} int getz() const {return z;} protected: int z; }; class C:public A,private B { public: void setCz(int c){setz(c);} int getCz() const{return z;} int getsum() const{return x+gety()+z;} （续）