c++-外观模式

#include <iostream>
#include <string>

using namespace std;

class subSystemOne
{
public:
 void MethodOne()
 {
  cout<<"子系统方法1"<<endl;
 }
};

class subSystemTwo
{
public:
 void MethodTwo()
 {
  cout<<"子系统方法2"<<endl;
 }
};

class subSystemThree
{
public:
 void MethodThree()
 {
  cout<<"子系统方法3"<<endl;
 }
};

class subSystemFor
{
public:
 void MethodFour()
 {
  cout<<"子系统方法4"<<endl;
 }
};

class Facade
{
private:
 subSystemOne one;
 subSystemTwo two;
 subSystemThree three;
 subSystemFor fouth;
public:
 void MethodA()
 {
  cout<<"方法组A"<<endl;
  one.MethodOne();
  two.MethodTwo();
  fouth.MethodFour();
 }
 void MethodB()
 {
  cout<<"方法组B"<<endl;
  three.MethodThree();
  fouth.MethodFour();
 }
};

int main()
{
  Facade facade;
  facade.MethodA();
  facade.MethodB();
}