03_05.cs

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using System;
namespace _03_05
{
    class Car
    {
        public string color;
        private float weight;
        private DateTime releasedate;
        public static int count;
        
        public Car()            // 无参数的构造函数 
        {
            color = "Red";
            weight = 1.0F;
            releasedate = DateTime.Today;
        }
        public Car(string Color, float Weight)  // 有参数的构造函数 
        {
            color = Color;
            weight = Weight;
            releasedate = DateTime.Today;
        }
        public void Run()
        {
            Console.WriteLine("我正在路上行驶……");
        }
        public void Run(string RoadName)
        {
            Console.WriteLine("我正在" + RoadName + "公路上行驶……");
        }
        public void Run(int Mileage)
        {
            Console.WriteLine("我已经行驶了" + Mileage + "公里……");
        }
    }
    
    class Class_03_05
    {
        public static void Main(String[] args)
        {
            Car car1 = new Car();
            Car car2 = new Car("Blue", 1.5F);
            Console.WriteLine("car1的颜色是" + car1.color);
            Console.WriteLine("car2的颜色是" + car2.color);
            car1.Run();
            car1.Run("51号");
            car1.Run(100);
        }
    }
}