用抽象方法和接口实现：

1 创建一个人的类包含属性：姓名，年龄，性别，住址  对属性进行封装，自我介绍，吃的方法
2 创建一个男人的类继承于人的类,创建一个独有的特性:体重,对自我介绍的方法进行重写(输出:我是?，我来自于?，我的性别是?)
3 创建一个女人的类继承于人的类，创建一个独有的特性:身高,对自我介绍的方法进行重写(输出:我是?,我来自于?)
4 定义一个测试类，对男人的信息和女人的信息进行输出(里氏替换原则)

这是一个抽象的方法，先定义属性，进行封装（sg 身高 和tz 体重  是因为在方法里面要用到，所以加上）

然后将自我介绍和吃的方法写上：

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
     
    namespace _009
    {
       public abstract class person
        {
            //姓名，年龄，性别，住址
            private string pname;
            private int page;
            private char psex;
            private string paddress;
            private string sg;
            private string tz;
     
            public string Pname
            {
                get
                {
                    return pname;
                }
     
                set
                {
                    pname = value;
                }
            }
     
            public int Page
            {
                get
                {
                    return page;
                }
     
                set
                {
                    page = value;
                }
            }
     
            public char Psex
            {
                get
                {
                    return psex;
                }
     
                set
                {
                    psex = value;
                }
            }
     
            public string Paddress
            {
                get
                {
                    return paddress;
                }
     
                set
                {
                    paddress = value;
                }
            }
            public abstract void showper();//自我介绍
            public abstract void eatper();//吃
        }
    }
————————————————

写一个接口

写上吃和男人自我介绍，女人自我介绍的方法：

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
     
    namespace _009
    {
         interface IPerson
        {
            void eat();//吃
            void show(string name, int age, char sex, string address,string tz);//男人的自我介绍
            void show(string name,string address,string sg);//女人的自我介绍
        }
    }
————————————————
 建一个男人和女人的类，继承并同时实现上面抽象方法和接口,将方法重载或实现：

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
     
    namespace _009
    {
        class Man : person,IPerson
        {
             string tz;
     
            public string Tz
            {
                get
                {
                    return tz;
                }
     
                set
                {
                    tz = value;
                }
            }
            
            public void eat()
            {
                Console.WriteLine("我不和你玩了，我要回家吃饭");
                Console.ReadKey();
            }
     
            public void show(string name, string address, string sg)
            {
            }
     
            public void show(string name, int age, char sex, string address)
            {
     
            }
     
            public void show(string name, int age, char sex, string address, string tz)
            {
                Console.WriteLine("大家好，我叫{0}性别{1}年龄{2}来自{3}体重{4}", name, age, sex, address, tz);
                Console.ReadKey();
            }
     
            public override void eatper()
            {
                Console.WriteLine("我中午还没吃饭呢");
                Console.ReadKey();
            }
            
            public override void showper()
            {
                Console.WriteLine("大家好，我叫{0}性别{1}来自{2}体重{3}",base.Pname,base.Psex,base.Paddress,this.Tz);
                Console.ReadKey();
            }
        }
    }
————————————————
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
namespace _009
{
    class Wuman : person, IPerson
    {
        private string sg;
 
        public string Sg
        {
            get
            {
                return sg;
            }
 
            set
            {
                sg = value;
            }
        }
 
        public void eat()
        {
            Console.WriteLine("我不和你玩了，我要回家吃饭");
            Console.ReadKey();
        }
 
        public void show(string name, string address, string sg)
        {
            Console.WriteLine("我叫{0}来自{1}身高{2}",name,address,sg);
            Console.ReadKey();
        }
 
        public void show(string name, int age, char sex, string address)
        {
            Console.WriteLine("大家好，我叫{0}性别{1}年龄{2}来自{3}", name, age, sex, address);
            Console.ReadKey();
        }
 
        public void show(string name, int age, char sex, string address, string tz)
        {
        }
 
        public override void eatper()
        {
            Console.WriteLine("哼，我中午不吃饭了");
            Console.ReadKey();
        }
 
        public override void showper()
        {
            Console.WriteLine("大家好，我叫{0}来自{1}身高{2}", base.Pname,base.Paddress,this.Sg);
            Console.ReadKey();
        }
    }
}
————————————————
 写一个测试类进行测试：

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
     
    namespace _009
    {
        class Program
        {
            static void Main(string[] args)
            {
                IPerson ip = new Wuman();
                IPerson iip = new Man();
                iip.eat();
                iip.show("小张", 18, '男', "厕所", "120");
                ip.eat();
                ip.show("小芳","丽春院","165");
     
                Console.WriteLine("............................");
                Man pe = new Man();
                pe.Pname = "小王";
                pe.Psex = '男';
                pe.Paddress = "火星";
                pe.Tz = "120";
                pe.eatper();
                pe.showper();
     
                Wuman pa = new Wuman();
                pa.Pname = "球球";
                pa.Paddress = "长沙";
                pa.Sg = "165";
                pa.eatper();
                pa.showper();
     
            }
        }
    }
————————————————
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原文链接：https://blog.csdn.net/qq_42469910/article/details/82712482