using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
               Student x1 = new Student("1001", "学生1", 0x12, 90M, 91M, 92M);
            Console.WriteLine("学生:{0} 总成绩:{1} 升学标志:{2}", x1.name, x1.计算总成绩().ToString(), x1.升学().ToString());
            Student x2 = new Student("1002", "学生2", 0x12, 92M, 91M, 82M);
            Console.WriteLine("学生:{0} 总成绩:{1} 升学标志:{2}", x2.name, x2.计算总成绩().ToString(), x2.升学().ToString());
            Student x3 = new Student("1003", "学生3", 0x12, 90M, 71M, 92M);
            Console.WriteLine("学生:{0} 总成绩:{1} 升学标志:{2}", x3.name, x3.计算总成绩().ToString(), x3.升学().ToString());
            Student x4 = new Student("1004", "学生4", 0x12, 60M, 11M, 22M);
            Console.WriteLine("学生:{0} 总成绩:{1} 升学标志:{2}", x4.name, x4.计算总成绩().ToString(), x4.升学().ToString());
        }
    }

    public class Person
    {
        // Fields
        private int _age;
        private string _name;

        // Properties
        public int age
        {
            get
            {
                return this._age;
            }
            set
            {
                this._age = value;
            }
        }

        public string name
        {
            get
            {
                return this._name;
            }
            set
            {
                this._name = value;
            }
        }
    }

    public class Student : Person
{
    // Fields
    private decimal _数学成绩;
    private string _学号;
    private decimal _英语成绩;
    private decimal _语文成绩;

    // Methods
    public Student(string 学号, string name, int age, decimal 数学成绩, decimal 语文成绩, decimal 英语成绩)
    {
       
        this.name = name;
        this .age = age;
        this.学号 = 学号;
        this.数学成绩 = 数学成绩;
        this.语文成绩 = 语文成绩;
        this.英语成绩 = 英语成绩;
        
    }

    public decimal 计算总成绩()
    {
        decimal sum=0;
        sum += this._数学成绩 + this._语文成绩 + this._英语成绩;
        return   sum ;
    }

    public bool 升学()
    {
        return (decimal.Compare(this.计算总成绩(), 200M) >= 0);
    }

    // Properties
    public decimal 数学成绩
    {
        get
        {
            return this._数学成绩;
        }
        set
        {
            this._数学成绩 = value;
        }
    }

    public string 学号
    {
        get
        {
            return this._学号;
        }
        set
        {
            this._学号 = value;
        }
    }

    public decimal 英语成绩
    {
        get
        {
            return this._英语成绩;
        }
        set
        {
            this._英语成绩 = value;
        }
    }

    public decimal 语文成绩
    {
        get
        {
            return this._语文成绩;
        }
        set
        {
            this._语文成绩 = value;
        }
    }
}




}

------解决方案--------------------
C# code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace zy2
{
    class Person
    {
        public string Name { get; set; }
        public int Age { get; set; }

    }

    class Student : Person
    {
        public string 学号 { get; set; }
        public int 英语成绩 { get; set; }
        public int 数学成绩 { get; set; }
        public int 语文成绩 { get; set; }
        private int 获得总分()
        {
            return this.英语成绩 + this.数学成绩 + this.语文成绩;
        }
        public void 显示总分()
        {
            Console.WriteLine("总分等于{0}.",