设计模式---策略模式

又是一个情人节，帅哥们正用各种办法取悦自己的女朋友或者老婆，买花、买包、吃顿烛光晚餐等等，而此刻我对着屏幕，敲击着无趣的26个字母...
想到上面哄女孩子开心的各种形式，突然想到一种设计模式---策略模式。各位帅哥的目的很明确就是让女孩子高兴，那么怎么让他们高兴那？每人选择针对自己适合的方法策略...
策略模式就是很好管理各种方法策略，根据需求灵活替换扩展。比如排序算法，方法有很多种，冒泡、快排、希尔排序等，这些算法都是为了让一组无序数字变为有序，而算法在不同场景下选择不同的算法，这个时候策略模式就能够方便我们解决这个问题。就以情人节哄女孩子开心写一个策略模式...

//策略基类
#pragma once
class CCoaxGirlStrategy
{
public:
    ~CCoaxGirlStrategy();
public:
    virtual void Coax() = 0;
protected:
    CCoaxGirlStrategy();
};
#include "goaxgirlstrategy.h"


CCoaxGirlStrategy::CCoaxGirlStrategy()
{
}


CCoaxGirlStrategy::~CCoaxGirlStrategy()
{
}
//给女朋友买束花
#pragma once
#include "goaxgirlstrategy.h"
class CBuyFlowerStrategy :
    public CCoaxGirlStrategy
{
public:
    CBuyFlowerStrategy();
    ~CBuyFlowerStrategy();
public:
    void Coax();
};
#include "buyflowerstrategy.h"
#include <iostream>

CBuyFlowerStrategy::CBuyFlowerStrategy()
{
}


CBuyFlowerStrategy::~CBuyFlowerStrategy()
{
}

void CBuyFlowerStrategy::Coax()
{
    std::cout << "Buy Flower Coax My GirlFriend" << std::endl;
}
//请女朋友吃个大餐
#pragma once
#include "goaxgirlstrategy.h"
class CEatFoodStrategy :
    public CCoaxGirlStrategy
{
public:
    CEatFoodStrategy();
    ~CEatFoodStrategy();
public:
    void Coax();
};
#include "eatfoodstrategy.h"
#include <iostream>

CEatFoodStrategy::CEatFoodStrategy()
{
}


CEatFoodStrategy::~CEatFoodStrategy()
{
}

void CEatFoodStrategy::Coax()
{
    std::cout << "Eat Food Coax My GirlFriend" << std::endl;
}

//哄女朋友场景
#pragma once
#include "goaxgirlstrategy.h"
class CGoaxGirlContext
{
public:
    CGoaxGirlContext();
    ~CGoaxGirlContext();
    void SetStrategy(CCoaxGirlStrategy* pStrategy);
    void CoaxGirl() const;
private:
    CCoaxGirlStrategy* m_pStrategy;
};
#include "goaxgirlcontext.h"


CGoaxGirlContext::CGoaxGirlContext()
{
    m_pStrategy = 0;
}


CGoaxGirlContext::~CGoaxGirlContext()
{
    if (m_pStrategy)
    {
        delete m_pStrategy;
        m_pStrategy = 0;
    }
}

void CGoaxGirlContext::SetStrategy(CCoaxGirlStrategy* pStrategy)
{
    if (m_pStrategy)
    {
        delete m_pStrategy;
        m_pStrategy = 0;
    }
    m_pStrategy = pStrategy;
}

void CGoaxGirlContext::CoaxGirl() const
{
    if (m_pStrategy)
    {
        m_pStrategy->Coax();
    }
}