using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace _15_4
{
    public partial class Form1 : Form
    {
        long ticks = 0;
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (button1.Text == "开始")
            {
                button1.Text = "暂停";
                timer1.Start();
            }
            else
            {
                button1.Text = "开始";
                timer1.Stop();
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            button1.Text = "开始";
            timer1.Stop();
            Timer.Text = "00:00:00:00";
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            ticks++;
            long hours = ticks / 360000;
            long minutes = (ticks - hours * 360000) / 6000;
            long seconds = (ticks - hours * 360000 - minutes * 6000) / 100;
            long ms = ticks - hours * 360000 - minutes * 6000 - seconds * 100;
            Timer.Text = string.Format("{0:00}:{1:00}:{2:00}:{3:00}",hours,minutes,seconds,ms);
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            ticks = 0;

        }
    }
}