11.9作业

#include <iostream>

using namespace std;
class Animal
{
private:

public:
    virtual void perform()=0;
    virtual ~Animal()
    {
        cout << "Animal析构调用" << endl;
    }
};
class GuideLion:public Animal
{
private:

public:
    void perform()
    {
       cout << "这是一只狮子" << endl;
    }
    ~GuideLion()
    {
        cout << "GuideLion析构调用" << endl;
    }
};
class GuideTager:public Animal
{
private:

public:
    void perform()
    {
       cout << "这是一只老虎" << endl;
    }
    ~GuideTager()
    {
        cout << "GuideTager析构调用" << endl;
    }
};
class GuideElephant:public Animal
{
private:

public:
    void perform()
    {
       cout << "这是一头大象" << endl;
    }
    ~GuideElephant()
    {
        cout << "GuideElephant析构调用" << endl;
    }
};
int main()
{
    GuideLion l;
    GuideElephant e;
    GuideTager t;
    Animal *p;
    p=&l;
    p->perform();
    p=&e;
    p->perform();
    p=&t;
    p->perform();
    return 0;
}