C++实现设计模式之 —策略与简单工程结合

策略模式封装算法

 // cash.cpp : 定义控制台应用程序的入口点。
 //
 #include "stdafx.h"
 #include<iostream>
 #include<string.h>
 #include <math.h>
 using namespace std;
 class CashSuper
 {
 public:
  virtual double accpetCash(double money)= ;
 };
 class CashNormal:public CashSuper
 {
 public:
  double accpetCash(double money) override
  {
   return money;
  }
 };
 class CashRebate:public CashSuper
 {
 public:
  CashRebate(double moneyRebate)
  {
   moneyRebate = moneyRebate;
  }
  double accpetCash(double money) override
  {
   return money * moneyRebate;
  }
 private:
  double moneyRebate;
 };
 class CashReturn:public CashSuper
 {
 public:
  CashReturn(double moneyCondition,double moneyReturn)
  {
   this->moneyCondition = moneyCondition;
   this->moneyReturn = moneyReturn;
  }
  double accpetCash(double money) override
  {
   double result = money;
   if(money > moneyCondition)
   {
    result = money - floor(money/moneyCondition)*moneyReturn;

   }
   return result;
  }
 private:
  double moneyCondition;
  double moneyReturn;
 };
 class CashFactory
 {
 public:
  static CashSuper *createCashAccpet(char type)
  {
   CashSuper *cs;
   switch(type)
   {
   case '':
    cs = new CashNormal();
    break;
   case '':
    cs = new CashReturn(,);
    break;
   case '':
    cs = new CashRebate(0.8);
    break;
   }
   return cs;
  }
 };
 class CashContext
 {
 public:
  CashContext(char type)
  {
   switch(type)
   {
   case '':
    cs = new CashNormal();
    break;
   case '':
    cs = new CashReturn(,);
    break;
   case '':
    cs = new CashRebate(0.8);
    break;
   }
  }
  CashSuper *cs;
  double GetResult(double money)
  {
   return cs->accpetCash(money);
  }
 };

 int _tmain(int argc, _TCHAR* argv[])
 {
  CashContext csuper('');
  double result = ;
  result = csuper.GetResult();
  cout<<result<<endl;
  system("pause");
  return ;
 }