C++设计模式之外观模式(Facade)

Myth丶恋晨 2022-08-02 09:50 98阅读 0赞

外观模式我们平时还是挺常使用的!  
\#include "StdAfx.h"  
\#include <SSTREAM>  
\#include<iostream>  
\#include<fstream>  
\#include<malloc.h>  
\#include <windows.h>  
\#include <list>  
using namespace std;  
class Customer  
\{//客户  
public:  
string m\_Name;  
Customer(string name):m\_Name(name)  
\{  
  
\}  
protected:  
private:  
\};  
  
class Bank  
\{//银行类  
public:  
bool HasSufficientSavings(Customer& pObj)  
\{  
printf("%s,看看是否有存款...\\n",pObj.m\_Name.c\_str());  
return true;  
\}  
protected:  
private:  
\};  
class Creditor  
\{//信用类  
public:  
bool IsCreditOk(Customer& pObj)  
\{  
printf("%s 是否有良好的信用!\\n",pObj.m\_Name.c\_str());  
return true;  
\}  
protected:  
private:  
\};  
class Loan  
\{  
public:  
bool IsGoodLoans(Customer& pObj)  
\{  
printf("%s,是否有好的贷款记录!\\n",pObj.m\_Name.c\_str());  
return true;  
\}  
protected:  
private:  
\};  
  
class Facade  
\{//外观模式  
public:  
Bank m\_Bank;  
Loan m\_Load;  
Creditor m\_Creditor;  
bool IsOK(Customer& pObj)  
\{  
return m\_Bank.HasSufficientSavings(pObj) &&  
m\_Creditor.IsCreditOk(pObj) && m\_Load.IsGoodLoans(pObj);  
\}  
protected:  
  
private:  
\};  
int main(void)  
\{  
//应用程序:如果不使用Facade(外观模式)的话,将如以下调用方式  
//应用程序与Bank Creditor Load 发生了耦合  
Customer pObj("普通模式");  
Bank pBank;  
Creditor pCreditor;  
Loan pLoad;  
bool blOK=false;  
blOK=pBank.HasSufficientSavings(pObj);  
blOK=pCreditor.IsCreditOk(pObj);  
blOK=pLoad.IsGoodLoans(pObj);  
//应用程序:如果使用Facade模式则只有如下代码'  
//应用程序只与Facade 类发生耦合  
Customer pFacadeCustomer("外观模式用户");  
Facade pFacade;  
bool bl=pFacade.IsOK(pFacadeCustomer);  
return 0;  
\}