第六章，上机练习3

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SJ3_4
{
    class Program
    {
        static void Main(string[] args)
        {
            List<Employee> empls = new List<Employee>();
            SE Joe=new SE("杰克",20,100);
            SE ai = new SE("艾边成", 25, 200);
            PM pm = new PM("艾斯", 30, 10);
            empls.Add(Joe);
            empls.Add(ai);
            empls.Add(pm);
            //foreach (Employee item in empls)
            //{
            //      Console.WriteLine(item.SayHi());
            //}
            for (int i = 0; i < empls.Count; i++)
            {
                Console.WriteLine(empls[i].SayHi());
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SJ3_4
{
    public class Employee
    {
        //姓名
        public string Name { get; set; }
        public int Age { get; set; }
        public virtual string SayHi() 
        {
            string message = string.Format("大家好");
            return message;
        }
        /// <summary>
        /// 构造函数
        /// </summary>
        public Employee(string name,int age) 
        {
            this.Name = name;
            this.Age = age;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SJ3_4
{
    /// <summary>
    /// 经理类
    /// </summary>
    public class PM:Employee
    {
        //管理经验
        public int YesarOfExperience { get; set; }
        //构造函数
        public PM(string name, int age, int yesarOfExperience): base(name, age)
        {
            this.YesarOfExperience = yesarOfExperience;
        }
        public override string SayHi() 
        {
            string message;
            message = string.Format("大家好，我是{0},今年{1}，管理经验是{0}", this.Name, this.Age, this.YesarOfExperience);
            return message;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SJ3_4
{
    /// <summary>
    /// 程序员类
    /// </summary>
    public class SE:Employee
    {
        //人气
        public int Popularity { get; set; }
        public SE(string name, int age, int popularity) : base(name,age) 
        {
            this.Popularity = popularity;
        }
        /// <summary>
        /// SayHi
        /// </summary>
        /// <returns></returns>
        public override string SayHi() 
        {
            string message;
            message= string.Format("大家好，我是{0},今年{1}，人气是{0}", this.Name, this.Age, this.Popularity);
            return message;
        }
    }
}