public (续) void display{cout<<"调用类B的函数"<<end;} int class C: public b public: void display{cout<<"调用类C的函数<<end} void main( Bb: C Cx=1; cabpublic: void display(){cout<<″调用类B的函数″<<endl;} int y; }; class C: public B { public: void display(){cout<<″调用类C的函数″<<endl;} }; void main() { A a; B b; C c; c.x=1; c.y=2; a=c; b=c; （续）