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

DesignPattern/BridgePattern/BridgeMain.cpp

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+//
+// Created by xiemenghui on 2018/7/21.
+//
+
+#include "BridgeMain.h"
+
+void BridgeMain()
+{
+    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ơ<EFBFBD><C6A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȣ<EFBFBD>
+    IElectricalEquipment * light = new Light();
+    IElectricalEquipment * fan = new Fan();
+
+    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><D8A3><EFBFBD><EFBFBD><EFBFBD>ʽ<EFBFBD><CABD><EFBFBD>ء<EFBFBD><D8A1><EFBFBD>λ<EFBFBD><CEBB><EFBFBD>أ<EFBFBD>
+    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ<EFBFBD><CABD><EFBFBD>غ͵<D8BA><CDB5>ƹ<EFBFBD><C6B9><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><CEBB><EFBFBD>غͷ<D8BA><CDB7>ȹ<EFBFBD><C8B9><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+    ISwitch * pullChain = new PullChainSwitch(light);
+    ISwitch * twoPosition = new TwoPositionSwitch(fan);
+
+    // <20><><EFBFBD>ơ<EFBFBD><C6A1>ص<EFBFBD>
+    pullChain->On();
+    pullChain->Off();
+
+    // <20>򿪷<EFBFBD><F2BFAAB7>ȡ<EFBFBD><C8A1>رշ<D8B1><D5B7><EFBFBD>
+    twoPosition->On();
+    twoPosition->Off();
+
+    SAFE_DELETE(twoPosition);
+    SAFE_DELETE(pullChain);
+    SAFE_DELETE(fan);
+    SAFE_DELETE(light);
+}

DesignPattern/BridgePattern/BridgeMain.h

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+//
+// Created by xiemenghui on 2018/7/21.
+//
+
+#ifndef DESIGNPATTERN_BRIDGEMAIN_H
+#define DESIGNPATTERN_BRIDGEMAIN_H
+
+#include "refined_abstraction.h"
+#include "concrete_implementor.h"
+
+#ifndef SAFE_DELETE
+#define SAFE_DELETE(p) { if(p){delete(p); (p)=nullptr;} }
+#endif
+
+void BridgeMain();
+
+#endif //DESIGNPATTERN_BRIDGEMAIN_H

DesignPattern/BridgePattern/abstraction.h

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+//
+// Created by xiemenghui on 2018/7/21.
+//
+
+#ifndef DESIGNPATTERN_ABSTRACTION_H
+#define DESIGNPATTERN_ABSTRACTION_H
+
+#include "implementor.h"
+
+// 开关
+class ISwitch
+{
+public:
+    ISwitch(IElectricalEquipment *ee){ m_pEe = ee; }
+    virtual ~ISwitch(){}
+    virtual void On() = 0;  // 打开电器
+    virtual void Off() = 0;  // 关闭电器
+
+protected:
+    IElectricalEquipment * m_pEe;
+};
+
+#endif //DESIGNPATTERN_ABSTRACTION_H

DesignPattern/BridgePattern/concrete_implementor.h

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+//
+// Created by xiemenghui on 2018/7/21.
+//
+
+#ifndef DESIGNPATTERN_CONCRETE_IMPLEMENTOR_H
+#define DESIGNPATTERN_CONCRETE_IMPLEMENTOR_H
+
+#include "implementor.h"
+#include <iostream>
+
+// 电灯
+class Light : public IElectricalEquipment
+{
+public:
+    // 开灯
+    virtual void PowerOn() override
+    {
+        std::cout << "Light is on." << std::endl;
+    }
+    // 关灯
+    virtual  void PowerOff() override
+    {
+        std::cout << "Light is off." << std::endl;
+    }
+};
+
+// 风扇
+class Fan : public IElectricalEquipment
+{
+public:
+    // 打开风扇
+    virtual void PowerOn() override
+    {
+        std::cout << "Fan is on." << std::endl;
+    }
+    //关闭风扇
+    virtual  void PowerOff() override
+    {
+        std::cout << "Fan is off." << std::endl;
+    }
+};
+
+
+#endif //DESIGNPATTERN_CONCRETE_IMPLEMENTOR_H

DesignPattern/BridgePattern/implementor.h

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+//
+// Created by xiemenghui on 2018/7/21.
+//
+
+#ifndef DESIGNPATTERN_IMPLEMENTOR_H
+#define DESIGNPATTERN_IMPLEMENTOR_H
+
+// 电器
+class IElectricalEquipment
+{
+public:
+    virtual ~IElectricalEquipment(){}
+    virtual void PowerOn() = 0;     // 打开
+    virtual void PowerOff() = 0;    // 关闭
+};
+
+#endif //DESIGNPATTERN_IMPLEMENTOR_H

DesignPattern/BridgePattern/refined_abstraction.h

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+//
+// Created by xiemenghui on 2018/7/21.
+//
+
+#ifndef DESIGNPATTERN_REFINED_ABSTRACTION_H
+#define DESIGNPATTERN_REFINED_ABSTRACTION_H
+
+#include "abstraction.h"
+#include <iostream>
+
+// 拉链式开关
+class PullChainSwitch : public ISwitch
+{
+public:
+    PullChainSwitch(IElectricalEquipment *ee) : ISwitch(ee) {}
+
+    // 用拉链式开关打开电器
+    virtual void On() override
+    {
+        std::cout << "Switch on the equipment with a pull chain switch." << std::endl;
+        m_pEe->PowerOn();
+    }
+
+    // 用拉链式开关关闭电器
+    virtual void Off() override
+    {
+        std::cout << "Switch off the equipment with a pull chain switch." << std::endl;
+        m_pEe->PowerOff();
+    }
+};
+
+// 两位开关
+class TwoPositionSwitch : public ISwitch
+{
+public:
+    TwoPositionSwitch(IElectricalEquipment *ee) : ISwitch(ee) {}
+
+    // 用两位开关打开电器
+    virtual void On() override
+    {
+        std::cout << "Switch on the equipment with a two-position switch." << std::endl;
+        m_pEe->PowerOn();
+    }
+
+    // 用两位开关关闭电器
+    virtual void Off() override {
+        std::cout << "Switch off the equipment with a two-position switch." << std::endl;
+        m_pEe->PowerOff();
+    }
+};
+
+
+#endif //DESIGNPATTERN_REFINED_ABSTRACTION_H