using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace 小学生100以内加法计算器
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void label1_Click(object sender, EventArgs e)
        {
        }
        private void label3_Click(object sender, EventArgs e)
        {
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            Random a = new Random();
            int num1 = a.Next(0, 50);
            label1.Text = num1.ToString();
            int num2 = a.Next(0, 50);
            label3.Text = num2.ToString();
        }
        double d, b, f = 0; double g;
        private void button1_Click(object sender, EventArgs e)
        {
            f = f + 1;
            if (textBox1.Text == "")
            { 
                MessageBox.Show("错误");
            }
            string  x = label1.Text;
            string y = label3.Text;
            string c = (int.Parse(x) + int.Parse(y)).ToString();
            if (textBox1.Text == c)
            {
                listBox1.Items.Add(x + "+" + y + "=" + c + " √");
                d = d + 1;
            }
            if (textBox1.Text != c)
            {
                listBox1.Items.Add(x + "+" + y + "=" + c + " ×");
                b = b + 1;
            }
            Random a = new Random();
            int num1 = a.Next(0, 50);
            label1.Text = num1.ToString();
            int num2 = a.Next(0, 50);
            label3.Text = num2.ToString();
            g = (d / f) * 100;
            g=Math.Round(g,2);
        }
        private void button3_Click(object sender, EventArgs e)
        {
            textBox1.Text = "";
            listBox1.Items.Clear();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            listBox1.Items.Add("共出题数" + f + "正确数" + d + "错误数" + b + "得分" + g);
        }
    }
}