1、思维导图

https://www.zhixi.com/view/9e899ee0

2、作业

#include <iostream>

using namespace std;

class Animal
{
private:
    string name;
public:
    Animal(){}
    Animal(string n):name(n){}
    virtual void perform()=0;
};

class Lion:public Animal
{
public:
    void perform()
    {
        cout << "凶猛异常" << endl;
    }
};

int main()
{
    Lion L;
    Animal *p;
    p=&L;
    p->perform();
    
    return 0;
}