建造者模式 - C++实现

// buliderpattern.cpp : 定义控制台应用程序的入口点。//#include "stdafx.h"#include <vector>#include <string>#include <iostream>using namespace std;class Food{private:vector<double>     m_vecFoodPrice;vector<string>    m_vecFoodName;public:void Add(double dFoodPrice, const string &strFoodName){m_vecFoodPrice.push_back(dFoodPrice);m_vecFoodName.push_back(strFoodName);}void DisPlay(){cout << "food list" << endl;cout << "................." << endl;for (int i = 0; i < m_vecFoodName.size(); ++i){cout << m_vecFoodName[i] << ":" << m_vecFoodPrice[i] << endl;}}};class Builder{public:virtual Food* getFood() { return NULL; }virtual void  buildNoodle() {}virtual void  buildDrink()  {}virtual void  buildRice()   {}};class BuilderA : public Builder{private:Food* m_food;public:BuilderA() { m_food = new Food(); }virtual void buildNoodle(){m_food->Add(10.1, "NoodleA");}virtual void buildDrink(){m_food->Add(10.2, "DrinkA");}virtual void buildRice(){m_food->Add(10.3, "RiceA");}    virtual Food* getFood(){return m_food;}};class BuilderB : public Builder{private:Food* m_food;public:BuilderB() { m_food = new Food(); }virtual void buildNoodle(){m_food->Add(20.1, "NoodleB");}virtual void buildDrink(){m_food->Add(20.2, "DrinkB");}virtual void buildRice(){m_food->Add(20.3, "RiceB");}virtual Food* getFood(){return m_food;}};class FoodManger{private:Builder*  m_Builder;public:FoodManger(Builder* Builder) { m_Builder = Builder;}void Construct(){m_Builder->buildDrink();m_Builder->buildNoodle();m_Builder->buildRice();}};int main(){Builder* p2b = new Builder();cout << "input A or B" << endl;char ch;cin >> ch;if (ch == 'A')p2b = new BuilderA();else if (ch == 'B')p2b = new BuilderB();FoodManger* p2fm = new FoodManger(p2b);   p2fm->Construct();Food* food = p2b->getFood();food->DisPlay();    return 0;}