• 第十章 汽车租赁系统


    本次综合练习的任务是开发”汽车租赁系统“,汽车租赁系统包括以下功能

    1.租车

    显示系统中所有可出租的汽车,选中要出租的汽车,输入租用人以出租汽车,如图所示

    2.还车

    在还车列表中选择汽车信息,输入出租天数,计算租金,如图所示

    3.新车入库

    需要录入汽车的车牌号,车型,颜色,使用时间,和每日租金,如果是卡车还要录入卡车的载重,如图所示

    具体实现过程:

      1.搭建系统

      按照类图创建类,体会Vehicle,Trech和Car三个类之间的关系

    Car类:

        

    namespace _09汽车租赁系统
    {
    public class Car:Vehicle
    {
    public Car(string licenseNO, string name, string color, int yearsOfService, double dailyRent)
    : base(licenseNO, name, color, yearsOfService, dailyRent)
    {
    ;
    }
    public override double CalcPrice()
    {
    double totalPrice = 0;
    double basicPrice = this.RentDate * this.DailyRent;
    if (this.RentDate <= 30)
    {
    totalPrice = basicPrice;
    }
    else
    {
    totalPrice = basicPrice + (this.RentDate - 30) * this.DailyRent * 0.1;
    }
    return totalPrice;
    }
    }
    }

    Vehicle类

        

    namespace _09汽车租赁系统
    {
    public abstract class Vehicle
    {
    public Vehicle() { }
    public Vehicle(string licenseNO,string name,string color,int yearOfService,double dailyRent)
    {
    this.licenseNO = licenseNO;
    this.name = name;
    this.color = color;
    this.yearOfService = yearOfService;
    this.dailyRent = dailyRent;
    }
    //租用日期
    private int rentDate;

    public int RentDate
    {
    get { return rentDate; }
    set { rentDate = value; }
    }
    //租用者
    private string rentUser;

    public string RentUser
    {
    get { return rentUser; }
    set { rentUser = value; }
    }
    //日租金
    private double dailyRent;

    public double DailyRent
    {
    get { return dailyRent; }
    set { dailyRent = value; }
    }
    //使用时间
    private int yearOfService;

    public int YearOfService
    {
    get { return yearOfService; }
    set { yearOfService = value; }
    }
    //颜色
    private string color;

    public string Color
    {
    get { return color; }
    set { color = value; }
    }
    //车名
    private string name;

    public string Name
    {
    get { return name; }
    set { name = value; }
    }
    //车牌号
    private string licenseNO;

    public string LicenseNO
    {
    get { return licenseNO; }
    set { licenseNO = value; }
    }
    //计算价格的方法
    public abstract double CalcPrice();
    }
    }

    Trech类:

        

    namespace _09汽车租赁系统
    {
    public class Truck:Vehicle
    {
    public Truck() { }
    public Truck(string licenseNO, string name, string color, int yearsOfService, double dailyRent, int load)
    : base(licenseNO, name, color, yearsOfService, dailyRent)
    {
    this.Load = load;
    }
    //载重量
    private int load;

    public int Load
    {
    get { return load; }
    set { load = value; }
    }
    //卡车费用计算方法
    // 30天以内(含30)按日租金计算
    // 30天以上超出部分:每天,每吨(载重量)增加日租金10%
    public override double CalcPrice()
    {
    double totalPrice = 0;
    double basicPrice = RentDate * DailyRent;
    if (RentDate<=30)
    {
    totalPrice = basicPrice;
    }
    else
    {
    totalPrice = basicPrice + (RentDate - 30) * (DailyRent * 0.1)*load;
    }
    return totalPrice;
    }
    }
    }

    //保存可租用车的集合(车辆名称,车辆对象)
    Dictionary<string, Vehicle> notRent;
    //保存已租用车辆的集合。
    Dictionary<string, Vehicle> alreadyRent;

    2.实现汽车出租

      

    if (txtRenter.Text=="")
    {
    MessageBox.Show("请输入租车人名称");
    return;
    }
    //从可租车辆集合中移除车辆A
    //将A添加到已租车辆集合中
    if (lvRent.SelectedItems.Count>0)
    {
    string number = lvRent.SelectedItems[0].Text;
    Vehicle ve = notRent[number];
    notRent.Remove(number);
    MyRefresh(notRent,lvRent);
    alreadyRent.Add(number, ve);
    MessageBox.Show("租车成功!");

    3.实现还车

      

    if (txtRentDate.Text=="")

    {
    MessageBox.Show("请输入租车时间");
    return;
    }
    //01.将车A从已租集合中移除 //02,将车A加入到可租车辆中
    string number=lvReturn.SelectedItems[0].Text;
    Vehicle ve = alreadyRent[number];
    alreadyRent.Remove(number);
    MyRefresh(alreadyRent, lvReturn);
    notRent.Add(number, ve);
    ve.RentDate = Convert.ToInt32(txtRentDate.Text);
    double money=0;
    money = ve.CalcPrice();
    MessageBox.Show("您需要支付"+money+"元");

    4.实现新车入库

      

      

    string lincesN0=txtAutoNum.Text;
    string name=txtName.Text;
    string color=cobColor.Text;
    int time=Convert.ToInt32(txtYears.Text);
    double dailyRent=Convert.ToInt32(txtLetting.Text);

    if (rdoCar.Checked)
    {

    Car car = new Car(lincesN0, name, color, time, dailyRent);
    notRent.Add(lincesN0, car);
    }
    if (rdoTruck.Checked)
    {
    int load = Convert.ToInt32(txtLoad.Text);
    Truck truck = new Truck(lincesN0, name, color, time, dailyRent, load);
    notRent.Add(lincesN0, truck);
    }
    MessageBox.Show("添加成功!");

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  • 原文地址:https://www.cnblogs.com/gaoweixiao99/p/4642018.html
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