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

@@ -0,0 +1,30 @@
+//
+// 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);
+}