C++多态练习

多态概念网上很多就不详细解释了，就是方便使用，和接口相似。

今天写多态的时候真的要疯了，对C的理解真是太垃圾了，根本不知道指针和地址怎么用。

遇到的最大的问题就是，抽象类不能直接实例化，必须指定指针，这卡了我好长时间，虽然主学逆向，但看来还得注重编程。

而且今天动摇了我的决心，发现护网太TM挣钱了，但是逆向却能让我沉浸其中，所以先学好逆向，再重拾渗透把。

下面给出今天写的代码，我在慢慢体会体会。

//老张开车去东北
#include<iostream>
#include<string>
using namespace std;
class Address
{
public:
	string ad;
	Address()
	{
		ad="东北"
	}
	Address(string d)
	{
		ad=d;
	}
};
class Vehicle
{
public:
	virtual void go(Address dest)=0;
};

class Car:public Vehicle
{
public:
	void go(Address dest)
	{
	cout<<"坐车去"<<dest.ad<<endl;
	}
};
class Train:public Vehicle
{
public:
	void go(Address dest)
	{
	cout<<"坐火车去"<<dest.ad<<endl;
	}
};
class Plain:public Vehicle
{
public:
	void go(Address dest)
	{
	cout<<"坐飞机去"<<dest.ad<<endl;
	}
};
class Driver
{
private:
	string name;
public:
	Address a;
	Vehicle *v;
	Driver(string n)
	{
		name=n;
	}
	void drive()
	{
		cout<<name;
		v->go(a);
	}
};
int main()
{
	Driver p("老张");
	Car c;
	Plain pl;
	Train t;
	//car
	p.v=&c;
	p.drive();
	//train
	p.v=&t;
	p.drive();
	//plain
	p.v=&pl;
	p.drive();
	return 0;
}
//小李打妖怪
#include<iostream>
#include<string>
#include<ctime>
using namespace std;
class Monster
{
private:
	int HP;
	string name;
public:
	Monster(int h,string n)
	{
		HP=h;
		name=n;
	}
	void Notify(int x)
	{
		HP=HP-x;
		if(HP<=0)
			cout<<name<<"已死！"<<endl;
		else
			cout<<name<<"已损失"<<x<<"血量！"<<endl;
	}
};

class IAttackStrategy
{
public:
	virtual void AttackTarget(Monster m)=0;
};

class WoodSword:public IAttackStrategy
{
public:
	void AttackTarget(Monster m)
	{
		m.Notify(20);
	}
};
class IronSword:public IAttackStrategy
{
public:
	void AttackTarget(Monster m)
	{
		m.Notify(50);
	}
};
class MagicSword:public IAttackStrategy
{
public:
	void AttackTarget(Monster m)
	{
		srand( (unsigned)time( NULL ) );
		int j =rand();
		if(j%2==0)
			m.Notify(100);
		else{
			cout<<"产生暴击！"<<endl;
			m.Notify(200);
		}
	}
};
class Role
{
public:
	IAttackStrategy *Weapon;
	void Attack(Monster m)
	{
		Weapon->AttackTarget(m);
	}
};
int main()
{
	Monster m1(30,"a"),m2(60,"b"),m3(200,"c");
	Role Li;
	//木剑
	WoodSword ws;
	Li.Weapon=&ws;
	Li.Attack(m1);
	//铁剑
	IronSword is;
	Li.Weapon=&is;
	Li.Attack(m2);
	//魔剑
	MagicSword ms;
	Li.Weapon=&ms;
	Li.Attack(m3);
	return 0;
}