---- 小灯Light的C++(www.cppentry.com)定义文件 ----
/*  light.h   */
#ifndef LIGHT_H
#define LIGHT_H
class Light
{ private:
int state_var;
public:
Light();
void turnOn();
void turnOff();
void performAction();
};
#endif
---- 小灯Light的C++(www.cppentry.com)实现文件 ----
/*  light.cpp  */
#include <iostream>
using namespace std;
#include "light.h"
extern void signal_to_light_UI(int);
Light::Light() { state_var = 0; }
void Light::turnOn()
{  if (state_var != 0)return;    
state_var = 1; 
this->performAction(); }
void Light::turnOff()
{  if (state_var != 1)return;    
state_var = 0; 
this->performAction();  }
void Light::performAction()
{  if (state_var == 0)
signal_to_light_UI(0);
else if (state_var == 1)  
signal_to_light_UI(1);  }
//end
---- 冰箱Refrigerator的C++(www.cppentry.com)定义文件 ----
/*  refrigerator.h   */
#ifndef REFRIGERATOR_H
#define REFRIGERATOR_H
#include "light.h" 
class Refrigerator
{ private:
int state_var;
Light* light_obj;
public:
Refrigerator();
void openTheDoor();
void closeTheDoor();
void performAction();
};
#endif
---- 冰箱Refrigerator的C++(www.cppentry.com)实现文件 ----
/*  refrigerator.cpp   */
#include <iostream>
using namespace std;
#include "refrigerator.h"
#include "mb.h"
extern void signal_to_button1_UI(int);
extern void signal_to_button2_UI(int);
void Refrigerator::openTheDoor()
{  if (state_var != 0)return;    
state_var = 1; 
this->performAction(); }
void Refrigerator::closeTheDoor()
{  if (state_var != 1)return;    
state_var = 0; 
this->performAction(); }
void Refrigerator::performAction()
{  Light* light_obj;
light_obj = MB::get_light_obj();
if (state_var == 0) 
{    signal_to_button1_UI(0);
signal_to_button2_UI(1);
light_obj->turnOff(); }
else if (state_var == 1)  
{     signal_to_button1_UI(1);
signal_to_button2_UI(0);
light_obj->turnOn(); }}
Refrigerator::Refrigerator()
{ state_var = 0;
signal_to_button1_UI(0);
signal_to_button2_UI(1);  }
//end
---- MB的C++(www.cppentry.com)定义文件 ----
/*  mb.h   */
#ifndef MB_H
#define MB_H
#include "refrigerator.h"
#include "light.h"
class MB
{ private:
static Refrigerator* refri_obj;     
static Light* light_obj;
public:
MB();
static void initial();
static Refrigerator* get_refrigerator_obj();
static Light* get_light_obj();
};
#endif
---- MB的C++(www.cppentry.com)实现文件 ----
/*  mb.cpp  */
#include <iostream>
using namespace std;
#include "mb.h"
#include "refrigerator.h"
#include "light.h"
MB::MB(){}
void MB::initial()
{    refri_obj = new Refrigerator();  
light_obj = new Light();  }

Refrigerator* MB::get_refrigerator_obj()
{     return refri_obj; }
Light* MB::get_light_obj()
{    return light_obj; }

Light* MB::light_obj = NULL;
Refrigerator* MB::refri_obj = NULL;
//end
---- Win32的GUI定义/实现文件 ----
/*  main.cpp  */
#include <windows.h>
#include "resource.h"
#include "refrigerator.h"
#include "mb.h"
const char ClassName[] = "MainWindowClass";
HWND hWndButton1, hWndButton2, hWndButton3;
PAINTSTRUCT ps;
HDC hdc;
int st;
Refrigerator* refri;
void signal_to_button1_UI(int ab)
{ EnableWindow(hWndButton1, ab); }
void signal_to_button2_UI(int ab)
{  EnableWindow(hWndButton2, ab); }
void signal_to_light_UI(int st)
{  if (st == 1) SetWindowText(hWndButton3, "Light(ON)");
else        SetWindowText(hWndButton3, "Light(OFF)");  }
LRESULT CALLBACK WndProc( HWND    hWnd,  UINT    Msg,
WPARAM  wParam, LPARAM  lParam )
{   switch (Msg){
case WM_CREATE: {
HINSTANCE hInstance
= (HINSTANCE)GetWindowLong(hWnd, GWL_HINSTANCE);
hWndButton1= CreateWindowEx( 0, "BUTTON", "Door(close)", 
WS_VISIBLE | WS_CHILD, 10, 30, 120, 35, 
hWnd, (HMENU)IDB_BUTTON1, hInstance, NULL); 

hWndButton2= CreateWindowEx( 0, "BUTTON", "Door(open)", 
WS_VISIBLE | WS_CHILD, 10, 120, 120, 35, 
hWnd, (HMENU)IDB_BUTTON2, hInstance, NULL); 

hWndButton3= CreateWindowEx( 0, "BUTTON", "Light(OFF)", 
WS_VISIBLE | WS_CHILD, 200, 60, 120, 35, 
hWnd, (HMENU)IDB_BUTTON3, hInstance, NULL); 
}
//--------------------------------------
MB::initial();
refri = MB::get_refrigerator_obj();
//--------------------------------------     
break;    
case WM_COMMAND: { 
switch(LOWORD(wParam)){ 
case IDM_FILE_EXIT: 
PostMessage(hWnd, WM_CLOSE, 0, 0);
break; 
case IDB_BUTTON1: {
switch (HIWORD(wParam)){
case BN_CLICKED:
refri->closeTheDoor();
break; 
} }
break;
case IDB_BUTTON2: {
switch (HIWORD(wParam)){
case BN_CLICKED:
refri->openTheDoor();
break; 
} }
break;
case IDM_ITEM: 
MessageBox(NULL, "Not Implemented", "", 
MB_OK | MB_ICONINFORMATION);
break; 
} 
return 0; 
} 
break;
case WM_CLOSE: DestroyWindow(hWnd);
break;
case WM_DESTROY: PostQuitMessage(0);
break;
default:
return (DefWindowProc(hWnd, Msg, wParam, lParam));
}
return 0;
}
INT WINAPI WinMain( HINSTANCE  hInstance, HINSTANCE  hPrevInstance,
LPSTR      lpCmdLine, INT        nCmdShow )
{
WNDCLASSEX    wc;
wc.cbSize            = sizeof(WNDCLASSEX);
wc.style            = 0;
wc.lpfnWndProc       = (WNDPROC)WndProc;
wc.cbClsExtra        = 0;
wc.cbWndExtra        = 0;
wc.hInstance         = hInstance;
wc.hIcon             = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_ICON));
wc.hIconSm           = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_ICON));
wc.hCursor           = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground     = (HBRUSH)(COLOR_WINDOW + 1);
wc.lpszMenuName      = MAKEINTRESOURCE(IDR_MENU);
wc.lpszClassName     = ClassName;
if (!RegisterClassEx(&wc))return 0;
HWND    hWnd;
hWnd = CreateWindowEx( WS_EX_CLIENTEDGE,ClassName, "Class Menu",
WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT,
400, 300, NULL, NULL, hInstance, NULL);
if (!hWnd)return 0;
ShowWindow(hWnd, SW_SHOW);

UpdateWindow(hWnd);
MSG    Msg;
while (GetMessage(&Msg, NULL, 0, 0)){
TranslateMessage(&Msg);
DispatchMessage(&Msg);   }
return Msg.wParam;
}