c#编程练习题13，我又写了 个很傻的程序，大家帮我看看怎么改进

    //建立三个类：居民、成人、官员。居民包含身份证号、姓名、出生日期；
   //成人继承自居民，多包含学历、职业两项数据；官员则继承自成人，多包含党派、职务两项数据。
   //要求每个类中都提供数据输入输出的功能。

    class resident
    {
        string name,id,birthDate;
        public string Name
        {
            get { return name; }
            set { name = value; }
        }
        public string ID
        {
            get { return id; }
            set { id = value; }
        }
        public string DOB
        {
            get { return birthDate; }
            set { birthDate = value; }
        }
        public virtual bool IO()
        {
           try
           { 
                Console.WriteLine("Please input name");
                string _name = Console.ReadLine();
                Console.WriteLine("Please input id");
                string _id = Console.ReadLine();
                Console.WriteLine("Please input DOB format as yy/mm/dd");
                string s_dob = Console.ReadLine();
                DateTime dt_dob; 
                if (DateTime.TryParse(s_dob,out dt_dob))
                {
                    Console.WriteLine("Name:{0}", _name);
                    Console.WriteLine("Id:{0}", _id);
                    Console.WriteLine("DOB:{0}", s_dob);
                }
                else
                    throw new Exception();
           
           }
            catch 
           {
                return false;
            }
            return true;
        }
    }
    
    class adult : resident
    {
        string studyExp, career;

        public string StudyExp
        {
            get { return studyExp; }
            set { studyExp = value; }
        }
        public string Career
        {
            get { return career; }
            set { career = value; }
        }
        public override bool IO()
        {
            try
            {
                Console.WriteLine("Please input name");
                string _name = Console.ReadLine();
                Console.WriteLine("Please input id");
                string _id = Console.ReadLine();
                Console.WriteLine("Please input DOB format as yy/mm/dd");
                string s_dob = Console.ReadLine();

                Console.WriteLine("Please input study experience");
                string _StudyExp = Console.ReadLine();
                Console.WriteLine("Please input Career");
                string _career = Console.ReadLine();

                DateTime dt_dob;
                if (DateTime.TryParse(s_dob, out dt_dob))
                {
                    Console.WriteLine("Name:{0}", _name);
                    Console.WriteLine("Id:{0}", _id);
                    Console.WriteLine("DOB:{0}", s_dob);
                    Console.WriteLine("StudyExp:{0}", _StudyExp);
                    Console.WriteLine("Carrer:{0}", _career);
                }
                else
                    throw new Exception();


            }
            catch
            {
                return false;
            }
            return true;

        }
    }
    
    class governer : resident
    { 
        string party, position;

        public string Party
        {
            get { return party; }
            set { party = value; }
        }
        public string Position
        {
            get { return position; }
            set { position = value; }
        }
        public override bool IO()
        {
            try
            {
                Console.WriteLine("Please input name");
                string _name = Console.ReadLine();
                Console.WriteLine("Please input id");
                string _id = Console.ReadLine();
                Console.WriteLine("Please input DOB format as yy/mm/dd");
                string s_dob = Console.ReadLine();

                Console.WriteLine("Please input study experience");
                string _StudyExp = Console.ReadLine();
                Console.WriteLine("Please input Career");
                string _career = Console.ReadLine();

                Console.WriteLine("Please input party");
                string _party = Console.ReadLine();
                Console.WriteLine("Please input position");
                string _position = Console.ReadLine(); 

                DateTime dt_dob;
                if (DateTime.TryParse(s_dob, out dt_dob))
                {
                    Console.WriteLine("Name:{0}", _name);
                    Console.WriteLine("Id:{0}", _id);
                    Console.WriteLine("DOB:{0}", s_dob);
                    Console.WriteLine("StudyExp:{0}", _StudyExp);
                    Console.WriteLine("Carrer:{0}", _career);
                    Console.WriteLine("Party:{0}", _party);
                    Console.WriteLine("Position:{0}", _position);
                }
                else
                    throw new Exception();
            }
            catch
            {
                return false;
            }
            return true;
        }
    }   


    class Program
    {
        static void Main(string[] args) 
        {
            Console.WriteLine("Create a resident or an adult or a governer:");
            string type=Console.ReadLine();
            bool result;
            switch (type)
            {
                case "adult":
                    adult myAdult = new adult();
                    result = myAdult.IO();
                    break;
                case "governer":
                    governer myGoverner = new governer();
                    result = myGoverner.IO(); 
                    break;
                case "resident":
                    resident myResident = new resident();
                    result = myResident.IO(); 
                    break;
                default:
                    result = true;
                    Console.WriteLine("you didn't create any instance, the program will end.");
                    break;
            }
            if (!result)
            {
                Console.WriteLine("Your input is invalid,the program will end.");
            }
        }
    }
要求每个类中都提供数据输入输出的功能，我理解对了吗？那么有没有关于方法的继承？我知道用super.method，不过就我目前的代码好像很难实现:P

还请各位不吝赐教。

9 个解决方案

#1

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~帮你顶吧。。。。  

#2

public override IO(....
{
     base.IO(); //这样可以吗？不是太了解你意思
}

#3

支持下~~~~~~

#4

代码改良了，谢谢各位回帖的朋友，又学到了新东西base.methord()继承方法

  //建立三个类：居民、成人、官员。居民包含身份证号、姓名、出生日期；
   //成人继承自居民，多包含学历、职业两项数据；官员则继承自成人，多包含党派、职务两项数据。
   //要求每个类中都提供数据输入输出的功能。

    class resident
    {
        string name,id,birthDate;
        public string Name
        {
            get { return name; }
            set { name = value; }
        }
        public string ID
        {
            get { return id; }
            set { id = value; }
        }
        public string DOB
        {
            get { return birthDate; }
            set { birthDate = value; }
        }
        public virtual bool IO()
        {
           try
           { 
                Console.WriteLine("Please input name");
                string _name = Console.ReadLine();
                Console.WriteLine("Please input id");
                string _id = Console.ReadLine();
                Console.WriteLine("Please input DOB format as yy/mm/dd");
                string s_dob = Console.ReadLine();
                DateTime dt_dob; 
                if (DateTime.TryParse(s_dob,out dt_dob))
                {
                    Console.WriteLine("Name:{0}", _name);
                    Console.WriteLine("Id:{0}", _id);
                    Console.WriteLine("DOB:{0}", s_dob);
                }
                else
                    throw new Exception();
           
           }
            catch 
           {
                return false;
            }
            return true;
        }
    }
    
    class adult : resident
    {
        string studyExp, career;

        public string StudyExp
        {
            get { return studyExp; }
            set { studyExp = value; }
        }
        public string Career
        {
            get { return career; }
            set { career = value; }
        }
        public override bool IO()
        {
            try
            {
                base.IO();
                Console.WriteLine("Please input study experience");
                string _StudyExp = Console.ReadLine();
                Console.WriteLine("Please input Career");
                string _career = Console.ReadLine();
                Console.WriteLine("StudyExp:{0}", _StudyExp);
                Console.WriteLine("Carrer:{0}", _career);
            }
            catch
            {
                return false;
            }
            return true;

        }
    }
    
    class governer : resident
    { 
        string party, position;

        public string Party
        {
            get { return party; }
            set { party = value; }
        }
        public string Position
        {
            get { return position; }
            set { position = value; }
        }
        public override bool IO()
        {
            try
            {
                base.IO();
                Console.WriteLine("Please input study experience");
                string _StudyExp = Console.ReadLine();
                Console.WriteLine("Please input Career");
                string _career = Console.ReadLine();
                Console.WriteLine("Please input party");
                string _party = Console.ReadLine();
                Console.WriteLine("Please input position");
                string _position = Console.ReadLine(); 

                Console.WriteLine("StudyExp:{0}", _StudyExp);
                Console.WriteLine("Carrer:{0}", _career);
                Console.WriteLine("Party:{0}", _party);
                Console.WriteLine("Position:{0}", _position);
            }
            catch
            {
                return false;
            }
            return true;
        }
    }   


    class Program
    {
        static void Main(string[] args) 
        {
            Console.WriteLine("Create a resident or an adult or a governer:");
            string type=Console.ReadLine();
            bool result;
            switch (type)
            {
                case "adult":
                    adult myAdult = new adult();
                    result = myAdult.IO();
                    break;
                case "governer":
                    governer myGoverner = new governer();
                    result = myGoverner.IO(); 
                    break;
                case "resident":
                    resident myResident = new resident();
                    result = myResident.IO(); 
                    break;
                default:
                    result = true;
                    Console.WriteLine("you didn't create any instance, the program will end.");
                    break;
            }
            if (!result)
            {
                Console.WriteLine("Your input is invalid,the program will end.");
            }
        }
    }

改动不大，就是adult和governer两个类的IO()方法都继承了基类的IO()。不过这样就行了吗？还有哪里可以改进的？

#5

可以尝试一下 把你的switch case 结构转换成一个函数，单独调用
那样才可以看出 虚函数的用处
    

#6

lz很有才，钱图很光明

#7

super.method这个是Java的写法
C#里是base.method

#8

这是面向对象编程的三大特性之一：多态性，派生类可以重写基类的方法，base.method，保留了原来基类的功能，new 则重新定义了方法

#9

主要就是继承了。