代理模式

海外代理的模式：

#define  _CRT_SECURE_NO_WARNINGS 
#include <iostream>
#include <string>

using namespace std;

//商品
class Item
{
public:
    Item(string kind, bool fact)
    {
        this->kind = kind;
        this->fact = fact;
    }

    string getKind()
    {
        return this->kind;
    }

    bool getFact()
    {
        return this->fact;
    }

private:
    string kind;//商品的种类
    bool fact; //商品的真假
};

// 抽象的购物方式
class Shopping
{
public:
    virtual void buy(Item *it) = 0;//抽象的买东西方法
};

//韩国购物
class KoreaShopping :public Shopping
{
public:
    virtual void buy(Item *it)  {
        cout << "去韩国买了" << it->getKind()<< endl;
    }
};

//美国购物
class USAShopping :public Shopping
{
public:
    virtual void buy(Item *it)  {
        cout << "去美国买了" << it->getKind() << endl;
    }
};

//海外代理
class OverseasProxy :public Shopping
{
public:
    OverseasProxy(Shopping *shpping)
    {
        this->shopping = shpping;
    }

    virtual void buy(Item *it)  {

        //1 辨别商品的真假，
        //2 进行购买（）
        //3 通过海关安检，带回祖国

        if (it->getFact() == true)
        {
            cout << "1 发现正品， 要购物" << endl;

            //用传递进来的购物方式去购物
            shopping->buy(it);


            //3 安检
            cout << "2 通过海关安检， 带回祖国" << endl;
        }
        else {
            cout << "1 发现假货，不会购买" << endl;
        }
        
    }
private:
    Shopping *shopping; //有一个购物方式
};

int main(void)
{
    //1 辨别商品的真假，
    //2 进行购买（）
    //3 通过海关安检，带回祖国

    Item it1("nike鞋", true);
    Item it2("CET4证书", false);

#if 0
    // 想去韩国买一个鞋
    Shopping *koreaShopping = new KoreaShopping;
    //1  辨别商品的真伪
    if (it1.getFact() == true) {
        cout << "1 发现正品， 要购物" << endl;
        //2 去韩国买了这个商品
        koreaShopping->buy(&it1);

        //3 安检
        cout << "2 通过海关安检， 带回祖国" << endl;
    }
    else {
        cout << "3 发现假货，不会购买" << endl;
    }
#endif

    Shopping *usaShopping = new USAShopping;
    Shopping *overseaProxy = new OverseasProxy(usaShopping);

    overseaProxy->buy(&it1);


    
    return 0;
}

 

王婆代理的例子

#define  _CRT_SECURE_NO_WARNINGS 
#include <iostream>

using namespace std;

//抽象的美女类
class BeautyGirl
{
public:
    //1 跟男人抛媚眼
    virtual void MakeEyesWithMan() = 0;
    //2 与男人共度美好的约会
    virtual void HappyWithMan() = 0;
};

//潘金莲
class JinLian :public BeautyGirl
{
public:
    //1 跟男人抛媚眼
    virtual void MakeEyesWithMan()  {
        cout << "潘金莲抛了一个媚眼" << endl;
    }
    //2 与男人共度美好的约会
    virtual void HappyWithMan()  {
        cout << "潘金莲跟你共度约会" << endl;
    }
};

class WangPo :public BeautyGirl
{
public:
    WangPo(BeautyGirl *girl) {
        this->girl = girl;
    }

    //1 跟男人抛媚眼
    virtual void MakeEyesWithMan() {
        // ...
        girl->MakeEyesWithMan();
        //...
    }
    //2 与男人共度美好的约会
    virtual void HappyWithMan() {
        girl->MakeEyesWithMan();
    }
private:
    BeautyGirl *girl;
};



//西门大官人
int main(void)
{
    BeautyGirl *jinlian = new JinLian;
    WangPo *wangpo = new WangPo(jinlian);

    //向让潘金莲抛一个
    wangpo->MakeEyesWithMan();

    //让金莲，月个会
    wangpo->HappyWithMan();
    
    return 0;
}

 

来源：https://www.cnblogs.com/strangemonkey/p/12551680.html