C++_策略模式_代码案例

#include <iostream>
using namespace std;

// 抽象武器 武器策略
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 Character
{
public:
    void setWeapon(WeaponStrategy* weapon)
    {
        this->pWeapon = weapon;
    }

    void ThrowWeapon()
    {
        this->pWeapon->UseWeapon();
    }

private:
    WeaponStrategy* pWeapon;
};

void test()
{
    // 创建角色
    Character* character = new Character;

    // 武器策略
    WeaponStrategy* knife = new Knife;
    WeaponStrategy* ak47 = new AK47;

    character->setWeapon(knife);
    character->ThrowWeapon();

    character->setWeapon(ak47);
    character->ThrowWeapon();

    delete ak47;
    delete knife;
    delete character;

    cin.get();
}

int main()
{
    test();
    return 0;
}