C# 派生和继承（派生类与基类）

using System;using System.Collections.Generic;using System.Text;namespace 继承
{    class Program
    {        static void Main(string[] args)
        {
            Mammal mammal = new Mammal();
            Console.WriteLine("我是一只哺乳动物");
            mammal.Scukle();
            mammal.Breate();
            mammal.Sleep();
            mammal.Message();
        }
    }    class Mammal : Vertebrate//派生类：基类    {        private string arms;        private string legs;        private int age;        public int Age
        {            set { age = value; }            get { return age; }
        }        public Mammal()
        {
            arms = "前肢";
            legs = "后肢";
            Age = 0;
            Weigth = 10;
            Temperature = 37;
        }        public void Scukle()
        {
            Console.WriteLine("哺乳");
        }        public void Message()
        {
            Console.WriteLine("体重：{0}", Weigth);
            Console.WriteLine("年龄：{0}", Age);
            Console.WriteLine("体温：{0}", Temperature);
            Console.WriteLine("我有{0}和{1}", arms, legs);
        }
    }
}

using System;using System.Collections.Generic;using System.Text;namespace 继承
{    class Vertebrate
    {        private string spine;        private double weigth;        private double temperature;        public double Weigth
        {            set
            {                if (value < 0)
                {
                    weigth = 0;
                }                else
                {
                    weigth = value;
                }
            }            get { return weigth; }
        }        public double Temperature
        {            set
            {                if (value < 0)
                {
                    temperature = 0;
                }                else
                {
                    temperature = value;
                }
            }            get { return temperature; }
        }        public Vertebrate()
        {
            spine = "脊柱";
            weigth = 0;
            temperature = 0;
        }        public void Breate()
        {
            Console.WriteLine("呼吸");
        }        public void Sleep()
        {
            Console.WriteLine("睡觉");
        }
    }
}