2.全局变量，int monster = 10000;定义英雄类hero，受保护的属性string name，int hp,int attck；公有的无参构造，有参构造，虚成员函数 void Atk(){blood-=0;}，法师类继承自英雄类，私有属性 int ap_atk=50；重写虚成员函数void Atk(){blood-=(attck-ap_atk);}；射手类继承自英雄泪，私有属性 int ac_atk = 100；实例化类对象，判断怪物何时被杀死。
 

#include <iostream>

using namespace std;

int monster = 10000;

class Hero
{
protected:
    string name;
    int hp;
    int attck;
public:
    Hero(){}
    Hero(string name,int hp,int attck):name(name),hp(hp),attck(attck)
    {}

    virtual void Atk()
    {
        monster-=0;
    }

};

class Caster:public Hero
{
    int ap_atk=50;

public:
    Caster(){}
    Caster(string name, int hp, int attack):Hero(name, hp, attack) {}

    void atk()
    {
        monster-=(attck+ap_atk);
    }
};

class Archer:public Hero
{
    int ad_atk = 100;
public:
    Archer() {}
    Archer(string name, int hp, int attack):Hero(name, hp, attack) {}
    void atk()
    {
        monster -= (attck + ad_atk);
    }
};



int main()
{
    while(1)
    {
        Caster h1("A", 20000, 300);
                h1.atk();//攻击
                if (monster <= 0)
                {
                    cout << "怪物已阵亡" << endl;
                    break;
                }
                cout << "A发动了攻击，怪物剩余血量" << monster << endl;

                Archer h2("B", 12000, 400);
                h2.atk();
                if (monster <= 0)
                {
                    cout << "怪物已阵亡" << endl;
                    break;
                }
                cout << "B发动了攻击，怪物剩余血量" << monster << endl;
    }
    return 0;
}