C#程序设计实验7 类继承-虚拟和重写

一、设计思想





二、主要源代码
（using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace extendAndPolymorphism
{
    internal class Program
    {
        static void Main(string[] args)
        {
            var d = new D();
            d.MyMethod(0);
            var e = new E();
            e.MyMethod(0);
            string d1 = d.Result;
            string e1 = e.Result;
            Console.WriteLine("传参都为0，结果一个为10，第二个为50");
            Console.WriteLine("d.MyMethod(0)={0},e.MyMethod(0)={1}",d1,e1);
            Console.ReadLine();
        }
        class D
        {
            public string Result { get; protected set; } = " ";
            public virtual void MyMethod(int num)
            {
                this.Result = (num+10).ToString();
            }
        }
        class E : D
        {
            public string Result;
            public override void MyMethod(int num)
            {
                this.Result = (num+50).ToString();
            }
        }
    }
}