C++编程基础二 26-习题5

#pragma once
#ifndef DRUG_H_
#define DRUG_H_
#include <string>
using namespace std;

enum Type
{
    PlusHP,
    PlusMP
};

class Drug
{
private:
    string name_;
    Type type_;
    int count_;
    float buyPrice_;
    float sellPrice_;
    static constexpr float Ratio = 0.75;
public:
    Drug(string name,Type type,int count ,float buyPrice);
    Drug();
    ~Drug();
    void buyDrug(float &money, int num);
    void sellDrug(float &money, int num);
    void showDrug();
    string showType();
};


#endif // !DRUG_H_

#include "stdafx.h"
#include "drug.h"
#include <iostream>

Drug::Drug()
{
}

Drug::Drug(string name, Type type, int count, float buyPrice)
{
    name_ = name;
    type_=type;
    count_=count;
    buyPrice_ = buyPrice;
    sellPrice_ = buyPrice * Ratio;
}

Drug::~Drug()
{
}

void Drug::buyDrug(float & money, int num)
{
    if (num > 0)
    {
        if (buyPrice_*num <= money)
        {
            money -= buyPrice_ * num;
            count_ += num;
            cout << "购买成功！" << endl;
        }
        else
        {
            cout << "警告：您的钱不购买" << num << "个药物！" << endl;
        }
    }
    else
    {
        cout << "警告：输入有误！" << endl;
    }
}

void Drug::sellDrug(float & money, int num)
{
    if (num > 0)
    {
        if (num <= count_)
        {
            count_ -= num;
            money += sellPrice_ * num;
            cout << "卖出成功！" << endl;
        }
        else
        {
            cout << "警告：您没有" << num << "个药物可以卖出！" << endl;
        }
    }
    else
    {
        cout << "警告：输入有误！" << endl;
    }
    
}

void Drug::showDrug()
{
    cout << "药物名称：" << name_ << "   数量：" << count_ << "   种类：" << type_ << "   买入价格：" << buyPrice_ << "   卖出价格" << sellPrice_<< endl;
}

string Drug::showType()
{
    if (type_ == 0)
    {
        return "PlusHP";
    }
    else
    {
        return "PlusMP";
    }
     
}

// C++函数和类 26-习题5.cpp: 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include "drug.h"
#include <iostream>
//-------------------------习题5-----------------------------
//完成程序：药品物资管理
//要求：
//1.创建药品类来完成习题4中对药品相关的管理。
//2.利用对象数组来完成对不同种类药品的信息存储。
//3.使用*this指针。
//4.使用作用域为类的常量。

int main()
{
    const int size = 2;
    Drug drug[size];
    drug[0] = Drug("回血药水", PlusHP, 20, 100); //使用自定义构造函数初始化
    drug[1] = Drug("回魔药水", PlusMP, 10, 150);
    float totalMoney = 1000;

    cout << "1.购买回血药水/2.购买回魔药水/3.卖出回血药水/4.卖出回蓝药水/5.显示目前拥有的药水与金钱/6.退出" << endl;
    cout << "请输入操作：" << endl;
    int input = 0;
    int number = 0;
    while (cin >> input)
    {
        if (input == 1)
        {
            cout << "请输入购买的数量：" << endl;
            if (cin >> number && number > 0)
            {
                drug[0].buyDrug(totalMoney, number);
                cout << "请继续输入操作：" << endl;
            }
        }
        else if (input == 2)
        {
            cout << "请输入购买的数量：" << endl;
            if (cin >> number && number > 0)
            {
                drug[1].buyDrug(totalMoney, number);
                cout << "请继续输入操作：" << endl;
            }

        }
        else if (input == 3)
        {
            cout << "请输入卖出的数量：" << endl;
            if (cin >> number && number > 0)
            {
                drug[0].sellDrug(totalMoney, number);
                cout << "请继续输入操作：" << endl;
            }
        }
        else if (input == 4)
        {
            cout << "请输入卖出的数量：" << endl;
            if (cin >> number && number > 0)
            {
                drug[1].sellDrug(totalMoney, number);
                cout << "请继续输入操作：" << endl;
            }
        }
        else if (input == 5)
        {
            cout << "目前拥有的药品：" << endl;
            for (int i = 0; i < size; i++)
            {
                cout << i + 1 << ":  " << endl;
                drug[i].showDrug();
            }
            cout << "拥有的金钱数： " << totalMoney << endl;
            cout << "请继续输入操作：" << endl;
        }
        else if (input == 6)
        {
            break;
        }
        else
        {
            cout << "输入错误，请重新输入，或输入6退出！" << endl;
        }

    }
    return 0;
}