#include<iostream>
using namespace std;
class Base
{
public:
virtual void fn() { cout <<"In Base Class\n";}
};
class SubClass : public Base
{
public:
virtual void fn(){ cout <<"In Sub Class\n"; }
};
int main()
{
Base bc;
Base *p;
SubClass sc;
p=&bc; p->fn();
p=≻ p->fn();
}
JSRUN 用代码说话
