源程序：
#include <iostream>
using namespace std;
class Base
{
public:
virtual void fun()
{
cout << "Base::fun()" << endl;
}
};
class Derived :public Base
{
public:
virtual void fun()
{
cout << "Derived::fun()" << endl;
}
};
void FunTest()
{
Base b;
Derived d;
b.fun();
d.fun();
}
int main()
{
FunTest();
system("pause");
return 1;
}
运行结果：
