using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace Math
{
  public partial class Form1 : Form
  {
    public Form1()
    {
      InitializeComponent();
    }
    System.Random t=new System .Random() ;//初始化隨機(jī)數(shù)函數(shù)
    string num;//定義一個(gè)字符串變量，用于顯示
    private void button1_Click(object sender, EventArgs e)
    {
      timer1.Start();
    }
    private void button2_Click(object sender, EventArgs e)
    {
      timer1.Stop();
    }
    private void timer1_Tick(object sender, EventArgs e)
    {
      this.num = Convert.ToString(t.Next(1,1000));//產(chǎn)生1到1000之間的一個(gè)隨機(jī)數(shù)
      textBox1.Text = num;
    }
    private void button3_Click(object sender, EventArgs e)
    {
      this.Close();//關(guān)閉程序
    }
  }
}