模拟跟随导演去动物园： 

#include <iostream>using namespace std;
class Animal
{
private:string name;
public:Animal(){}Animal(string name):name(name){}virtual void perform(){cout << name << "为我们讲解,说：" << endl;}
};
class lion:public Animal
{
private:string name;string peculiarity;
public:lion(){}lion(string name,string n,string peculiarity):Animal(name),name(n),peculiarity(peculiarity){}void perform(){Animal::perform();cout << name  << "正在睡觉" << endl;cout << "特点：" << peculiarity <<endl;}
};
class Monkey:public Animal
{
private:string name;string peculiarity;
public:Monkey(){}Monkey(string name,string n,string peculiarity):Animal(name),name(n),peculiarity(peculiarity){}void perform(){Animal::perform();cout << name << "正在打招呼" << endl;cout << "特点：" << peculiarity <<endl;}
};
int main()
{Animal *a;lion l("刘玉文","狮子","体型大，躯体均匀，四肢中长，趾行性。 头大而圆，吻部较短，视、听、嗅觉均很发达。");Monkey m("刘玉文","猴子","有爪的哺乳类动物；有胎盘的动物;有较高的眼眶;有发达的盲肠；胸部有二个乳房；有三种牙齿和脱落更新的恒齿；姆指与其他指头呈相反的位置；脑壳有一钙质的裂缝。");a=&l;a->perform();a=&m;a->perform();return 0;
}