【案例】定义一个猫类Cat，描述猫的以下特征：品种、毛色、体重、出生日期、喵喵叫、抓老鼠。创建并使用这个类的案例。

【案例目的】(1)学会自定义类；

(2)学会自定义类创建、实例化对象，通过对象引用成员。

【代码】如下：

 

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            Cat cat1 = new Cat();
            cat1.SetInfo("波斯猫", "白色", 2.3f);
            cat1.Display();
            cat1.Miaow();
            Console.WriteLine();

            Cat cat2 = new Cat();
            cat2.SetInfo("埃及猫", "银色黑斑", 3.1f);
            cat2.Display();
            cat2.CatchMouse();
            Console.WriteLine();
            Console.ReadLine();
        }
    }
    //定义一个猫类，描述猫的信息
    public class Cat
    {
        string variety;
        string haircolor;
        float weight;
        DateTime birthday;

        public void CatchMouse()
        {
            Console.WriteLine("我会抓老鼠!");
        }
        public void Miaow()
        {
            Console.WriteLine("喵喵~~!");
        }
        //设置猫各字段值的方法
        public void SetInfo(string myVariety, string myHairColor, float myWeight)
        {
            variety = myVariety;
            haircolor = myHairColor;
            weight = myWeight;
            birthday = DateTime.Today;
        }
        //显示猫信息的方法
        public void Display()
        {  //ToShortDateString
            Console.WriteLine("我是一只{0}\n毛色:{1},重量:{2}千克,生日:{3}", variety, haircolor, weight, birthday.ToShortDateString());
        }
    }
 }

 

运行结果如下：

 

 添加属性，并在main()方法中添加对属性的访问。

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            Cat cat1 = new Cat();
            cat1.SetInfo("波斯猫", "白色", 2.3f);
            cat1.Display();
            cat1.Miaow();
            Console.WriteLine();

            Cat cat2 = new Cat();
            cat2.SetInfo("埃及猫", "银色黑斑", 3.1f);
            cat2.Display();
            cat2.CatchMouse();
            Console.WriteLine();
            cat1.Weight = 2.7f;
            Console.WriteLine("cat1的体重变成{0}千克了", cat1.Weight);
            cat2.HairColor = "黑色";
            Console.WriteLine("cat2的毛染成{0}了", cat2.HairColor);
            Console.ReadLine();
        }
    }
        //定义一个猫类，描述猫的信息
        public class Cat
        {
            string variety;
            string haircolor;
            float weight;
            DateTime birthday;
            public string Variety
            {
                set { variety = value; }
                get { return variety; }
            }
            public string HairColor
            {
                set { haircolor = value; }
                get { return haircolor; }
            }
            public float Weight
            {
                set { weight = value; }
                get { return weight; }
            }
            public void CatchMouse()
            {
                Console.WriteLine("我会抓老鼠!");
            }
            public void Miaow()
            {
                Console.WriteLine("喵喵~~!");
            }
            //设置猫各字段值的方法
            public void SetInfo(string myVariety,string myHairColor,float myWeight)
            {
                variety = myVariety;
                haircolor = myHairColor;
                weight = myWeight;
                birthday = DateTime.Today;
            }
            //显示猫信息的方法
            public void Display()
            {    //ToShortDateString设置日期格式
                 Console.WriteLine("我是一只{0}\n毛色:{1},重量:{2}千克,生日:{3}", variety, haircolor, weight, birthday.ToShortDateString());
            }           
        }   
}

运行结果如下：