一题练习题跪求解！

Question

//定义一个汽车类，该类具有重量和速度属性；再定义一个跑车类，该类继承汽车类的属性
并拥有自己的颜色属性；然后声明一个汽车类的对象和一个跑车类的对象，并把它们的属性输出到控制台上.

Answer 1

这个？
public class clsCar
{
    private double _heavy = 0;
    public double Heavy
    {
        get {return _heavy;}
        set {_heavy = value;}
     }
     private double _speed = 0;
    public double Speed
    {
        get {return _speed ;}
        set {_speed = value;}
     }
}public class clsSCar:clsCar
{
    private Color _color = new Color(255,255,255,255);
    public Color Color
    {
        get {return _color;}
        set {_color = value;}
     }
}public void main()
{
   clsCar car = new clsCar();
   clsSCar scar = new clsSCar();
   console.write();
}大体这样，只是自己这样写的，没测试过。

Answer 2

    public class Car
    {
        public Car()
        {
        }
        public Car(float weight,float speed)
        {
            this._weight = weight;
            this._speed = speed;
        }
        private float _weight;
        public float Weight
        {
            get;
            set;
        }
        private float _speed;
        public float Speed
        {
            get;
            set;
        }
        public virtual void WriteInfo()
        {
            Console.WriteLine("重量:" + this._weight.ToString() + ",速度:" + this._speed.ToString());
        }
    }
    public class RunCar : Car
    {
        public RunCar(float weight, float speed, ConsoleColor color):base(weight, speed)
        {
            this._color = color;
        }
        private ConsoleColor  _color;
        public ConsoleColor Color
        {
            get;
            set;
        }
        public override void WriteInfo()
        {
            base.WriteInfo();
            Console.WriteLine("颜色:" + this._color.ToString());
        }
    }      static void Main(string[] args)
        {
            Car car = new Car(12f, 34f);
            Car runcar = new RunCar(23f, 55f, ConsoleColor.Red);
            car.WriteInfo();
            runcar.WriteInfo();
        }

Answer 3

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Car car = new Car(1000, 80);
            Console.WriteLine("汽车的重量为：{0}，速度为：{1}", car.Weight, car.Speed);            SportCar sportCar = new SportCar(2000, 120, Color.Red);
            Console.WriteLine("跑车的重量为：{0}，速度为：{1}，颜色为：{2}", sportCar.Weight, sportCar.Speed, sportCar.Color.ToString());            Console.Read();
        }
    }    public class Car
    {
        public Car(double weight, double speed)
        {
            this.m_Weight = weight;
            this.m_Speed = speed;
        }        private double m_Weight;        /// <summary>
        /// 重量
        /// </summary>
        public double Weight
        {
            get { return this.m_Weight; }
            set { this.m_Weight = value; }
        }        private double m_Speed;        /// <summary>
        /// 速度
        /// </summary>
        public double Speed
        {
            get { return this.m_Speed; }
            set { this.m_Speed = value; }
        }
    }    public class SportCar : Car
    {
        public SportCar(double weight, double speed, Color color)
            : base(weight, speed)
        {
            this.m_Color = color;
        }        private Color m_Color;        /// <summary>
        /// 颜色
        /// </summary>
        public Color Color
        {
            get { return this.m_Color; }
            set { this.m_Color = value; }
        }
    }
}

Answer 4

public  class Car
    {
        public int Weight { get; set; }
        public int Speed { get; set; }
        public Car()
        {        }
        public Car(int weight,int speed)
        {
            this.Weight = weight;
            this.Speed = speed;
        }
        public virtual void GetCarInfo()
        {
            Console.WriteLine("Car Weight:" + Weight.ToString() + ",Car Speed:" + Speed.ToString());
        }
    }
public class SportsCar:Car
    {
        public System.Drawing.Color CarColor
        {
            get;
            set;
        }
        public SportsCar()
        { }
        public SportsCar(int weight,int speed,System.Drawing.Color color):base(weight,speed)
        {
            this.CarColor = color;
        }
        public override void GetCarInfo()
        {
            base.GetCarInfo();
            Console.WriteLine(this.CarColor.ToString());
        }
    }static void Main(string[] args)
        {            Car car = new Car { Weight = 100, Speed = 200 };
            SportsCar sportCar = new SportsCar { Weight = 100, Speed = 200,CarColor=System.Drawing.Color.Red };
            car.GetCarInfo();
            sportCar.GetCarInfo();
            Console.ReadLine(); 
        }
这其中用到的知识点:
1.自动属性
2.对象初始化器
3.继承与多态(virtual--override)