添加设计模式及例子，包括：单例、抽象工厂、适配器、桥接、观察者模式

Author: huihut

Diff for: DesignPattern/AbstractFactoryPattern/Factory.cpp

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+//
+// Created by xiemenghui on 2018/7/20.
+//
+
+#include "Factory.h"
+#include "concrete_factory.h"
+
+Factory* Factory::CreateFactory(FACTORY_TYPE factory)
+{
+    Factory *pFactory = nullptr;
+    switch (factory) {
+        case FACTORY_TYPE::BENZ_FACTORY:  // 奔驰工厂
+            pFactory = new BenzFactory();
+            break;
+        case FACTORY_TYPE::BMW_FACTORY:  // 宝马工厂
+            pFactory = new BmwFactory();
+            break;
+        case FACTORY_TYPE::AUDI_FACTORY:  // 奥迪工厂
+            pFactory = new AudiFactory();
+            break;
+        default:
+            break;
+    }
+    return pFactory;
+}

Diff for: DesignPattern/AbstractFactoryPattern/Factory.h

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+//
+// Created by xiemenghui on 2018/7/20.
+//
+
+#ifndef DESIGNPATTERN_FACTORY_H
+#define DESIGNPATTERN_FACTORY_H
+
+#include "product.h"
+
+// 抽象工厂模式
+class Factory {
+public:
+    enum FACTORY_TYPE {
+        BENZ_FACTORY,   // 奔驰工厂
+        BMW_FACTORY,    // 宝马工厂
+        AUDI_FACTORY    // 奥迪工厂
+    };
+
+    virtual ICar* CreateCar() = 0;      // 生产汽车
+    virtual IBike* CreateBike() = 0;    // 生产自行车
+    static Factory * CreateFactory(FACTORY_TYPE factory); // 创建工厂
+};
+
+#endif //DESIGNPATTERN_FACTORY_H

Diff for: DesignPattern/AbstractFactoryPattern/FactoryMain.cpp

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+//
+// Created by xiemenghui on 2018/7/20.
+//
+
+#include "Factory.h"
+#include "product.h"
+#include "FactoryMain.h"
+#include <iostream>
+using namespace std;
+
+void FactoryMain()
+{
+    // ąźłŰ
+    Factory * pFactory = Factory::CreateFactory(Factory::FACTORY_TYPE::BENZ_FACTORY);
+    ICar * pCar = pFactory->CreateCar();
+    IBike * pBike = pFactory->CreateBike();
+
+    cout << "Benz factory - Car: " << pCar->Name() << endl;
+    cout << "Benz factory - Bike: " << pBike->Name() << endl;
+
+    SAFE_DELETE(pCar);
+    SAFE_DELETE(pBike);
+    SAFE_DELETE(pFactory);
+
+    // ąŚÂí
+    pFactory = Factory::CreateFactory(Factory::FACTORY_TYPE::BMW_FACTORY);
+    pCar = pFactory->CreateCar();
+    pBike = pFactory->CreateBike();
+    cout << "Bmw factory - Car: " << pCar->Name() << endl;
+    cout << "Bmw factory - Bike: " << pBike->Name() << endl;
+
+    SAFE_DELETE(pCar);
+    SAFE_DELETE(pBike);
+    SAFE_DELETE(pFactory);
+
+    // °ÂľĎ
+    pFactory = Factory::CreateFactory(Factory::FACTORY_TYPE::AUDI_FACTORY);
+    pCar = pFactory->CreateCar();
+    pBike = pFactory->CreateBike();
+    cout << "Audi factory - Car: " << pCar->Name() << endl;
+    cout << "Audi factory - Bike: " << pBike->Name() << endl;
+
+    SAFE_DELETE(pCar);
+    SAFE_DELETE(pBike);
+    SAFE_DELETE(pFactory);
+}

Diff for: DesignPattern/AbstractFactoryPattern/FactoryMain.h

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+//
+// Created by xiemenghui on 2018/7/20.
+//
+
+#ifndef DESIGNPATTERN_FACTORYMAIN_H
+#define DESIGNPATTERN_FACTORYMAIN_H
+
+#ifndef SAFE_DELETE
+#define SAFE_DELETE(p) { if(p) {delete(p); (p)=nullptr;}}
+#endif
+
+void FactoryMain();
+
+#endif //DESIGNPATTERN_FACTORYMAIN_H

Diff for: DesignPattern/AbstractFactoryPattern/concrete_factory.h

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+//
+// Created by xiemenghui on 2018/7/20.
+//
+
+#ifndef DESIGNPATTERN_CONCRETE_FACTORY_H
+#define DESIGNPATTERN_CONCRETE_FACTORY_H
+
+#include "Factory.h"
+#include "concrete_product.h"
+
+// 奔驰工厂
+class BenzFactory : public Factory
+{
+public:
+    ICar* CreateCar()
+    {
+        return new BenzCar();
+    }
+    IBike* CreateBike()
+    {
+        return new BenzBike();
+    }
+};
+
+// 宝马工厂
+class BmwFactory : public Factory
+{
+public:
+    ICar* CreateCar() {
+        return new BmwCar();
+    }
+
+    IBike* CreateBike() {
+        return new BmwBike();
+    }
+};
+
+// 奥迪工厂
+class AudiFactory : public Factory
+{
+public:
+    ICar* CreateCar() {
+        return new AudiCar();
+    }
+
+    IBike* CreateBike() {
+        return new AudiBike();
+    }
+};
+
+#endif //DESIGNPATTERN_CONCRETE_FACTORY_H

Diff for: DesignPattern/AbstractFactoryPattern/concrete_product.h

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+//
+// Created by xiemenghui on 2018/7/20.
+//
+
+#ifndef DESIGNPATTERN_CONCRETE_PRODUCT_H
+#define DESIGNPATTERN_CONCRETE_PRODUCT_H
+
+#include "product.h"
+
+/********** 汽车 **********/
+// 奔驰
+class BenzCar : public ICar
+{
+public:
+    string Name()
+    {
+        return "Benz Car";
+    }
+};
+
+// 宝马
+class BmwCar : public ICar
+{
+public:
+    string Name()
+    {
+        return "Bmw Car";
+    }
+};
+
+// 奥迪
+class AudiCar : public ICar
+{
+public:
+    string Name()
+    {
+        return "Audi Car";
+    }
+};
+
+/********** 自行车 **********/
+// 奔驰
+class BenzBike : public IBike
+{
+public:
+    string Name()
+    {
+        return "Benz Bike";
+    }
+};
+
+// 宝马
+class BmwBike : public IBike
+{
+public:
+    string Name()
+    {
+        return "Bmw Bike";
+    }
+};
+
+// 奥迪
+class AudiBike : public IBike
+{
+public:
+    string Name()
+    {
+        return "Audi Bike";
+    }
+};
+
+#endif //DESIGNPATTERN_CONCRETE_PRODUCT_H

Diff for: DesignPattern/AbstractFactoryPattern/product.h

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+//
+// Created by xiemenghui on 2018/7/20.
+//
+
+#ifndef DESIGNPATTERN_PRODUCT_H
+#define DESIGNPATTERN_PRODUCT_H
+
+#include <string>
+using std::string;
+
+// 汽车接口
+class ICar
+{
+public:
+    virtual string Name() = 0;
+};
+
+// 自行车接口
+class IBike
+{
+public:
+    virtual string Name() = 0;
+};
+
+#endif //DESIGNPATTERN_PRODUCT_H

Diff for: DesignPattern/AdapterPattern/AdapterMain.h

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+//
+// Created by xiemenghui on 2018/7/20.
+//
+
+#ifndef DESIGNPATTERN_ADAPTERMAIN_H
+#define DESIGNPATTERN_ADAPTERMAIN_H
+
+#include "adapter.h"
+
+void AdapterMain()
+{
+    // ´´½¨ÊÊÅäÆ÷
+    IRussiaSocket * pAdapter = new PowerAdapter();
+
+    // ³äµç
+    pAdapter->Charge();
+
+    SAFE_DELETE(pAdapter);
+}
+
+#endif //DESIGNPATTERN_ADAPTERMAIN_H

Diff for: DesignPattern/AdapterPattern/adaptee.h

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+//
+// Created by xiemenghui on 2018/7/20.
+//
+
+#ifndef DESIGNPATTERN_ADAPTEE_H
+#define DESIGNPATTERN_ADAPTEE_H
+
+#include <iostream>
+
+// 自带的充电器（两脚扁型）
+class OwnCharger
+{
+public:
+    void ChargeWithFeetFlat()
+    {
+        std::cout << "OwnCharger::ChargeWithFeetFlat\n";
+    }
+};
+
+#endif //DESIGNPATTERN_ADAPTEE_H

Diff for: DesignPattern/AdapterPattern/adapter.h

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+//
+// Created by xiemenghui on 2018/7/20.
+//
+
+#ifndef DESIGNPATTERN_ADAPTER_H
+#define DESIGNPATTERN_ADAPTER_H
+
+#include "target.h"
+#include "adaptee.h"
+
+#ifndef SAFE_DELETE
+#define SAFE_DELETE(p) { if(p){delete(p); (p)=NULL;} }
+#endif
+
+// 电源适配器
+class PowerAdapter : public IRussiaSocket
+{
+public:
+    PowerAdapter() : m_pCharger(new OwnCharger()){}
+    ~PowerAdapter()
+    {
+        SAFE_DELETE(m_pCharger);
+    }
+    void Charge()
+    {
+        // 使用自带的充电器（两脚扁形）充电
+        m_pCharger->ChargeWithFeetFlat();
+    }
+private:
+    // 持有需要被适配的接口对象（自带的充电器）
+    OwnCharger* m_pCharger;
+};
+
+#endif //DESIGNPATTERN_ADAPTER_H

Diff for: DesignPattern/AdapterPattern/target.h

@@ -0,0 +1,16 @@
+//
+// Created by xiemenghui on 2018/7/20.
+//
+
+#ifndef DESIGNPATTERN_TARGET_H
+#define DESIGNPATTERN_TARGET_H
+
+// 俄罗斯提供的插座
+class IRussiaSocket
+{
+public:
+    // 使用双脚圆形充电（暂不实现）
+    virtual void Charge() = 0;
+};
+
+#endif //DESIGNPATTERN_TARGET_H

Diff for: DesignPattern/BridgePattern/BridgeMain.cpp

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+//
+// Created by xiemenghui on 2018/7/21.
+//
+
+#include "BridgeMain.h"
+
+void BridgeMain()
+{
+    // 创建电器（电灯、电风扇）
+    IElectricalEquipment * light = new Light();
+    IElectricalEquipment * fan = new Fan();
+
+    // 创建开关（拉链式开关、两位开关）
+    // 将拉链式开关和电灯关联起来，两位开关和风扇关联起来
+    ISwitch * pullChain = new PullChainSwitch(light);
+    ISwitch * twoPosition = new TwoPositionSwitch(fan);
+
+    // 开灯、关灯
+    pullChain->On();
+    pullChain->Off();
+
+    // 打开风扇、关闭风扇
+    twoPosition->On();
+    twoPosition->Off();
+
+    SAFE_DELETE(twoPosition);
+    SAFE_DELETE(pullChain);
+    SAFE_DELETE(fan);
+    SAFE_DELETE(light);
+}