水果打折的简单实现

最新推荐文章于 2023-10-18 12:23:25 发布

liangmz

最新推荐文章于 2023-10-18 12:23:25 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/liangmz/article/details/78115106

本文介绍了一个使用C++实现的水果篮子折扣系统。该系统包括水果类(CFruits)和水果篮子类(CFruitBasket)，并实现了两种折扣策略：CDiscount类用于打折优惠，CMeetMinus类用于满减优惠。通过不同类型的水果实例和用户选择的折扣策略展示如何计算最终总价。

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#include <iostream>
#include <stdlib.h>
#include <vector>

using namespace std;
class CFruits
{
private:
	double t_count;
	double t_price;
public:
	void SetCount(double count)
	{
		t_count =count;
	}
	void SetPrice(double price)
	{
		t_price =price;
		cout<<"set price "<<t_price<<endl;
	}
	double GetPrice()
	{
		return this->t_price;
	}
	double GetCount()
	{
		return this->t_count;
	}
};
class CFruitBasket
{
private:
	vector <CFruits> m_vfruits;
	double m_total;
public:
	virtual ~CFruitBasket()
	{

	}
	void SetFruit(vector <CFruits> fruits)
	{
		m_vfruits = fruits;
	}
	virtual double GetTotal()
	{
		m_total = 0;

		for(vector<CFruits>::iterator iter=m_vfruits.begin();iter!=m_vfruits.end();iter++)
		{
			cout<<(*iter).GetCount()<<endl;

			m_total += (*iter).GetPrice()*(*iter).GetCount();
		}
		return m_total;
	}
};
class CDiscount:public CFruitBasket
{
private:
	double m_rate;

public:
	void SetRate(double rate)
	{
		m_rate = rate;
	}
	double GetRate()
	{
		cout << "Rate is :"<<m_rate<<endl;
		return this->m_rate;
	}
	virtual double GetTotal()
	{
		double ret = CFruitBasket::GetTotal()*m_rate;
		cout << "ret is:"<<ret<<endl;
		return ret;
	}
};
class CMeetMinus:public CFruitBasket
{
private:
	double m_least;
	double m_minus;
public:
	void SetLeast(double least)
	{
		m_least=least;
	}
	void SetMinus(double minus)
	{
		m_minus = minus;
	}
	double GetMinus()
	{
		return m_minus;
	}
	double GetLeast()
	{
		return m_least;
	}
	double GetTotal()
	{
		double ret = CFruitBasket::GetTotal();
		if(ret>=m_least)
		{
			return (ret-m_minus);
		}
		else
			return ret;
	}
};

int main()
{
	CFruits Apple;

	Apple.SetPrice(4);
	Apple.SetCount(5);
	cout << "Apple Price is :"<<Apple.GetPrice()<<endl;

	CFruits Orange;

	Orange.SetPrice(3);
	Orange.SetCount(10);
	cout << "Orange Price is :"<<Orange.GetPrice()<<endl;

	CFruits Durian;
	Durian.SetPrice(18.8);
	Durian.SetCount(5);
	cout << "Durian Price is :"<<Durian.GetPrice()<<endl;

	vector <CFruits> vfruits;
	vfruits.push_back(Apple);
	vfruits.push_back(Orange);
	vfruits.push_back(Durian);
	CDiscount discountA;
	discountA.SetRate(0.8);
	discountA.GetRate();

	CMeetMinus minusA;
	minusA.SetLeast(100);
	minusA.SetMinus(20);
	CFruitBasket *basket = NULL;
	cout<<"Please enter your choice:"<<endl;
	int in;
	cin>>in;
	switch(in)
	{
	case 0:
		cout<<"NO DISCOUNT!"<<endl;
		basket = new CFruitBasket;
		break;
	case 1:
		cout<<"STRATEGY 1!"<<endl;
		basket =&discountA ;
		break;
	case 2:
		cout<<"STRATEGY 2!"<<endl;
		basket =&minusA ;
		break;
	default:
		cout<<"WRONG NUMBER!"<<endl;
		break;
	}
	basket->SetFruit(vfruits);
	cout<<"Total is :"<<basket->GetTotal()<<endl;

	return 0;
}