1.策略模式

策略模式定义了一系列的算法，并将一个算法封装起来，而且是他们还可以相互替换，策略模式让算法独立于使用它的客户而独立变化

2.代码实现

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
class WeaponStrategy
{
public:
	virtual void UseWeapon() = 0;

};

class Knife:public WeaponStrategy
{
public:
	virtual void UseWeapon()
	{
		cout<<"使用匕首！"<<endl;
	}
};
class AK47:public WeaponStrategy
{
public:
	virtual void UseWeapon()
	{
		cout<<"使用AK47"<<endl;
	}
};

class Charcter
{
public:
	void setWeapon(WeaponStrategy* weapon)
	{
		this->pWeapon = weapon;
	}
	void ThrowWeapon()
	{
		this->pWeapon->UseWeapon();
	}
	WeaponStrategy* pWeapon;
};
int main()
{
	{
		//创建角色
		Charcter* t_charater = new Charcter;
		//武器策略
		WeaponStrategy* t_knife = new Knife;
		WeaponStrategy* t_ak47 = new AK47;

		t_charater->setWeapon(t_knife);
		t_charater->ThrowWeapon();
		t_charater->setWeapon(t_ak47);
		t_charater->ThrowWeapon();

		delete t_knife;
		delete t_ak47;
		delete t_charater;
		t_ak47 = nullptr;
		t_charater = nullptr;
		t_knife = nullptr;
		
	}
	system("pause");
	return 0;
}

3.实现效果图