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/AdapterPattern/AdapterMain.h

@@ -0,0 +1,21 @@
+//
+// Created by xiemenghui on 2018/7/20.
+//
+
+#ifndef DESIGNPATTERN_ADAPTERMAIN_H
+#define DESIGNPATTERN_ADAPTERMAIN_H
+
+#include "adapter.h"
+
+void AdapterMain()
+{
+    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+    IRussiaSocket * pAdapter = new PowerAdapter();
+
+    // <20><><EFBFBD><EFBFBD>
+    pAdapter->Charge();
+
+    SAFE_DELETE(pAdapter);
+}
+
+#endif //DESIGNPATTERN_ADAPTERMAIN_H

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

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

DesignPattern/AdapterPattern/target.h

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+//
+// 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