using System;
using System.Windows.Forms;

namespace All_Student_4._1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            richTextBox1.Text = "";
        }

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                Pupil pu = new Pupil(textBox1.Text, Convert.ToInt16(textBox2.Text), Convert.ToDouble(textBox3.Text), Convert.ToDouble(textBox4.Text));
                richTextBox1.Text += pu.getInfo();
                textBox1.Text = "";
                textBox2.Text = "";
                textBox3.Text = "";
                textBox4.Text = "";
                textBox5.Text = "";
            }
            catch
            {
                MessageBox.Show("请输入完善的信息！");
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            try
            {
                Middle pu = new Middle(textBox1.Text, Convert.ToInt16(textBox2.Text), Convert.ToDouble(textBox3.Text), Convert.ToDouble(textBox4.Text), Convert.ToDouble(textBox5.Text));
                richTextBox1.Text += pu.getInfo();
                textBox1.Text = "";
                textBox2.Text = "";
                textBox3.Text = "";
                textBox4.Text = "";
                textBox5.Text = "";
            }
            catch
            {
                MessageBox.Show("请输入完善的信息！");
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            try
            {
                College pu = new College(textBox1.Text, Convert.ToInt16(textBox2.Text), Convert.ToDouble(textBox3.Text), Convert.ToDouble(textBox4.Text));
                richTextBox1.Text += pu.getInfo();
                textBox1.Text = "";
                textBox2.Text = "";
                textBox3.Text = "";
                textBox4.Text = "";
                textBox5.Text = "";
            }
            catch
            {
                MessageBox.Show("请输入完善的信息！");
            }
        }
    }
    public abstract class Student
    {
        protected string name;
        protected int age;
        public static int number;
        public Student(string name, int age)
        {
            this.name = name;
            this.age = age;
            number++;
        }
        public string Name
        {
            get { return name; }
        }
        public virtual string type
        {
            get { return "学生"; }
        }
        public abstract double total();
        public string getInfo()
        {
            string result = string.Format("总人数：{0},姓名：{1},{2},{3}岁", number, Name, type, age);
            if (type == "小学生")
                result += string.Format(",平均成绩:{0:N2}:\n", total() / 2);
            else if (type == "中学生")
                result += string.Format(",平均成绩:{0:N2}:\n", total() / 3);
            else
                result += string.Format(",总学分为{0:N2}:\n", total());
            return result;
        }
    }
    public class Pupil : Student //派生小学生类
    {
        protected double chinese;
        protected double math;
        public Pupil(string name, int age, double chinese, double math) : base(name, age)
        {
            this.chinese = chinese;
            this.math = math;
        }
        public override string type
        {
            get { return "小学生"; }           
        }
        public override double total()
        {
            return chinese + math;
        }
    }
    public class Middle : Student //派生中学生类
    {
        protected double chinese;
        protected double math;
        protected double english;
        public Middle(string name, int age, double chinese, double math, double english) : base(name, age)
        {
            this.chinese = chinese;
            this.math = math;
            this.english = english;
        }
        public override string type
        {
            get { return "中学生"; }           
        }
        public override double total()
        {
            return chinese + math + english;
        }
    }
    public class College : Student  //派生大学生类
    {
        protected double obligatory;
        protected double elective;
        public College(string name, int age, double obligatory, double elective)
            : base(name, age)
        {
            this.obligatory = obligatory;
            this.elective = elective;
        }
        public override string type
        {
            get {return "大学生";}
        }
        public override double total()
        {
            return obligatory + elective;
        }
    }
}