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Without software, we are nothing.

Design Pattern -- Adapter

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// Adapter.cpp : Defines the entry point for the console application.
// author: chillyc
// email: chillycreator @t gmail.com

#include<iostream>
#include<string>
using namespace std;

/// adapter pattern is used for combining two or more classes,
/// which have the same behaviors but different interfaces.
/// some classes is common used in future, and the other which are special will never used.
/// common used classes should be public, and the other is private.
/// some classes which inherit adapter class will never use the special ones. 
/// adapter pattern is divided into two patterns.
/// one is belong to class structure, and the other is belong to object structure.

#ifndef INTERFACEA_H
#define INTERFACEA_H
/// Interface A is a common interface!
class Interface_A{
public :
  virtual void connect_com();
};
#endif
void Interface_A::connect_com(){
  cout<<"connect a"<<endl;
}

#ifndef INTERFACEB_H
#define INTERFACEB_H
/// Interface B is not a common interface, 
/// it will be used in some special area!
class Interface_B{
public :
  virtual void connect_B();
};
#endif
void Interface_B::connect_B(){
  cout<< "connect b"<<endl;
}

#ifndef ADAPTERCLASS_H
#define ADAPTERCLASS_H
/// this class uses private inheritance to construct adapter.
/// and it is a kind of class structure.
class Adapter_Class: public Interface_A, private Interface_B{
public:
  Adapter_Class();
  ~Adapter_Class();
  virtual void connect();
};

/// this class uses private member variable to construct adapter.
/// and it uses object relationship.
class Adapter_Object: public Interface_A{
private:
  Interface_B * b;
public:
  Adapter_Object();
  ~Adapter_Object();

  virtual void connect();
};
#endif

Adapter_Class::Adapter_Class(){
  cout<< "Adapter_Class construct"<<endl;

}
Adapter_Class::~Adapter_Class(){}
void Adapter_Class::connect(){
  Interface_A::connect_com();
  Interface_B::connect_B();
}

Adapter_Object::Adapter_Object(){
  cout<<"Adapter_Object construct"<<endl;
  b = new Interface_B();

}
Adapter_Object::~Adapter_Object(){
  delete b;
}
void Adapter_Object::connect(){
  Interface_A::connect_com();
  b->connect_B();
}

int main()
{
  Adapter_Class ac;
  ac.connect();
  Adapter_Object ao;
  ao.connect();
  return 0;
}

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