1 #include <iostream>
2 using namespace std;
3 class A {
4 private:
5 int nVal;
6 public:
7 void Fun()
8 { cout << "A::Fun" << endl; };
9 virtual void Do()
10 { cout << "A::Do" << endl; }
11 };
12 class B:public A {
13 public:
14 virtual void Do()
15 { cout << "B::Do" << endl;}
16 };
17 class C:public B {
18 public:
19 void Do( )
20 { cout <<"C::Do"<<endl; }
21 void Fun()
22 { cout << "C::Fun" << endl; }
23 };
24 void Call(
25 A* p
26 ) {
27 p->Fun(); p->Do();
28 }
29 int main() {
30 Call( new A());
31 Call( new C());
32 return 0;
33 }
