[em1]大家看一下这个程序...
using System;
using System.Collections.Generic;
using System.Text;

namespace 抽象方法和属性在派生类中实现
{
    abstract class Base
    {
        protected double x;
        protected double y;
        public abstract double x
        {
            get;
            set;
        }
        public abstract double y
        {
            get;
            set;
        }
        public abstract void MyMethod();
    }
    class Derived : Base
    {
        public override double x
        {
            get
            {
                return x;
            }
            set
            {
                x = value;
            }
        }
        public override double y
        {
            get
            {
                return y;
            }
            set
            {
                x = value;
            }
        }
        public override void MyMethod()
        {
            Console.WriteLine("Method Mythod in Base has now been completed.");
        }
    }
        class MainClass
        {
            public static void Main()
            {
                Derived myderived=new Derived();
                Console.WriteLine("Please input the value of x;");
                myderived.x=double.Parse(Console.ReadLine());

                Console.WriteLine("Please input the value of y:");
                myderived.y=double.Parse(Console.ReadLine());

                Console.WriteLine("The current value of x and y are x={0},y={1}",myderived.x,myderived.y);

                myderived.MyMethod();
            }
        }

    
}


这个程序完全是按一本书抄下来的,但结果却无法通过编译,出现这样的错误提示:
"类型'抽象方法和属性在派生类中实现.Base'已经包含"x(y)"的定义"..
我找了好久也找不好原因,各位好手帮一下忙了...[em1][em2]