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using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

//学生输入姓名和语文、数学、英语，编程求出总分和平均分，并在屏幕上显示XX的总分和平均分

namespace Student_management_system

{

    class Student

    {

        private String name;   //学生姓名

        private int chinese;  //语文成绩

        private int math; //数学成绩

        private int english;  //英语成绩

        public String student_name   //这个不是一个方法，它是一个变量，当对象调用该变量时，就要给这个对象的name属性赋值,或者获取该变量的值

        {

           set{   //直接在里面定义set方法，这样对象就可以通过这样调用来赋值了，如 Student s;s.student_name="唐僧";

            this.name=value;

            }

           get{   //定义get方法，对象可以这样获取get方法里面返回来的name值，如s.student_name;

            return name;

            }

        }

        public int student_chinese

        {

            set

            {

                this.chinese = value;

            }

            get

            {

                return this.chinese;

            }

        }

        public int student_math

        {

            set

            {

                this.math = value;

            }

            get

            {

                return this.math;

            }

        }

        public int student_english

        {

            set

            {

                this.english = value;

            }

            get

            {

                return this.english;

            }

        }

        public Student(String name, int chinese, int math, int english)

        {

            this.name = name;

            this.chinese = chinese;

            this.math = math;

            this.english = english;

        }

        public int sum()  //求总分

        {

            int sum = this.chinese + this.english + this.math;

            return sum;

        }

        public float average()   //求平均分

        {

            float avg = sum() / 3;

            return avg;

        }

        static void Main(string[] args)

        {

            Student s = new Student();

            Console.WriteLine("请输入学生姓名");

            s.student_name = Console.ReadLine();

            Console.WriteLine("请输入学生科目成绩：");

            s.student_chinese =Convert.ToInt32(Console.ReadLine());

            s.student_english = Convert.ToInt32(Console.ReadLine());

            s.student_math = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine(s.name + "的语文是" + s.student_chinese + "分，数学是" + s.student_math + "分，英语是" + s.student_english + "分，总分：" + s.sum()+"，平均分：" + s.average());

            s.student_chinese = 69;

            s.student_math = 100;

            Console.WriteLine("修改分数后-->" + s.name + "的语文是" + s.student_chinese + "分，数学是" + s.student_math + "分，英语是" + s.student_english + "分，总分：" + s.sum() + "，平均分：" + s.average());

            //加上这句话，否则一运行就会闪退，即刚出现命令窗口就会马上消失

            Console.ReadLine();

        }

    }

}