未完待续

 1 #include <iostream>
 2 #include<typeinfo>
 3 #include<vector>
 4 
 5 using namespace std;
 6 
 7 class Base{
 8 public:
 9     virtual void fun(){cout << "Base::fun\n";}
10 };
11 class Derived : public Base{
12 public:
13     void fun(int i){cout << "Derived the i = " << i << endl;}
14 };
15 class Sunzi : public Derived{
16 public:
17     void fun(){cout << "in Sunzi\n";}
18 };
19 
20 int main()
21 {
22     Derived de;
23     de.fun(1);
24     //de.fun(); //error
25     Sunzi sun;
26     sun.fun();
27     Base *ba = &sun;
28     ba->fun();
29     return 0;
30 }