第一个有窗口的程序，写于大一的暑假

在最早学习C++的时候，老师只是让我们使用编写控制台程序，目的是熟悉C++的语法规则。控制台程序的没有图形界面，相对落后，也不实用。于是，我尝试使用Visual Studio 2008自带的帮助，编写一些易操作的程序。

几经周折，我找到了窗体设计演练，跟着帮助走，制作了一个秒表控件。（注意是控件）

通过学习发现，控件和窗口是不同的，出于代码继承性和重用性考虑，一般先写具有特定功能的控件，然后再把控件添加到窗口中去。可以由几个小控件来组成一个大的控件。

第一个程序（还只是控件）做的是秒表。（stopwatch）然后，想把发现了控件与程序的差异，于是就想把控件添加进一个form，觉得这样就成了一个程序。但是，很遗憾地失败了。于是，利用复制、粘贴功能，将代码复制到窗体程序。好歹也利用了代码的“继承和重用”。哈哈

主界面上有四个按钮，start，record，clear，end。按start 开始计时，按record，按一次记录一次时间。按clear清除记录的时间。按end停止计时。

一些细节处理：

首先，限制了如果不按start，那么record等键按了没有反应。

bug：

其次，由于使用的是扫描系统时间进行计时，所以，如果在计时过程中，调整了系统时间，会出现计时的错误。代码 如下：

首先是Form1.cs的内容：

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 StopWatchWindows

{

public partial class Form1 : Form

{

//-------开始时间------------

private int starthour;

private int startminute;

private int startsecond;

private int startmillisecond;

//---------------------------

public Form1()

{

InitializeComponent();

}

private void Form1_Load(object sender, EventArgs e)

{

}

private void Start_Click(object sender, EventArgs e)

{

Immediate.Enabled = true;

Immediate.Interval = 100;//扫描的时间间隔为100毫秒

this.timerecord.Text = "";

//记时起点

starthour = DateTime.Now.Hour;

startminute = DateTime.Now.Minute;

startsecond = DateTime.Now.Second;

startmillisecond = DateTime.Now.Millisecond;

}

private void Record_Click(object sender, EventArgs e)

{

if (Immediate.Enabled == true)

{

this.timerecord.Text += "/n";//换行

//计算时间

int rechour;

int recminute;

int recsecond;

int recmillisecond;

int outhour, outminute, outsecond, outmillisecond;

rechour = DateTime.Now.Hour;

recminute = DateTime.Now.Minute;

recsecond = DateTime.Now.Second;

recmillisecond = DateTime.Now.Millisecond;

outmillisecond = recmillisecond - startmillisecond;

if (outmillisecond < 0)

{

outmillisecond += 1000;

recsecond--;

}

outsecond = recsecond - startsecond;

if (outsecond < 0)

{

outsecond += 60;

recminute--;

}

outminute = recminute - startminute;

if (outminute < 0)

{

outminute += 60;

rechour--;

}

outhour = rechour - starthour;

{//输出时间

if (outhour == 0)

this.timerecord.Text += "00";

else

this.timerecord.Text += outhour;

this.timerecord.Text += ":";

//输出小时

if (outminute < 10)

if (outminute == 0) this.timerecord.Text += "00";

else this.timerecord.Text += "0" + outminute;

else this.timerecord.Text += outminute;

this.timerecord.Text += ":";

//输出分钟

if (outsecond < 10)

if (outsecond == 0) this.timerecord.Text += "00";

else this.timerecord.Text += "0" + outsecond;

else this.timerecord.Text += outsecond;

this.timerecord.Text += ":";

//输出秒

if (outmillisecond < 100)

if (outmillisecond < 10) this.timerecord.Text += "00" + outmillisecond;

else this.timerecord.Text += "0" + outmillisecond;

else this.timerecord.Text += outmillisecond;

//输出毫秒

}

}

}

private void Clear_Click(object sender, EventArgs e)

{

this.timerecord.Text = "";

}

private void End_Click(object sender, EventArgs e)

{

if (Immediate.Enabled == true)

{

Immediate.Enabled = false;

this.timepresent.Text = "End";

this.timerecord.Text += "/n";

//计算时间

int rechour;

int recminute;

int recsecond;

int recmillisecond;

int outhour, outminute, outsecond, outmillisecond;

rechour = DateTime.Now.Hour;

recminute = DateTime.Now.Minute;

recsecond = DateTime.Now.Second;

recmillisecond = DateTime.Now.Millisecond;

outmillisecond = recmillisecond - startmillisecond;

if (outmillisecond < 0)

{

outmillisecond += 1000;

recsecond--;

}

outsecond = recsecond - startsecond;

if (outsecond < 0)

{

outsecond += 60;

recminute--;

}

outminute = recminute - startminute;

if (outminute < 0)

{

outminute += 60;

rechour--;

}

outhour = rechour - starthour;

{//输出时间

if (outhour == 0)

this.timerecord.Text += "00";

else

this.timerecord.Text += outhour;

this.timerecord.Text += ":";

//输出小时

if (outminute < 10)

if (outminute == 0) this.timerecord.Text += "00";

else this.timerecord.Text += "0" + outminute;

else this.timerecord.Text += outminute;

this.timerecord.Text += ":";

//输出分钟

if (outsecond < 10)

if (outsecond == 0) this.timerecord.Text += "00";

else this.timerecord.Text += "0" + outsecond;

else this.timerecord.Text += outsecond;

this.timerecord.Text += ":";

//输出秒

if (outmillisecond < 100)

if (outmillisecond < 10) this.timerecord.Text += "00" + outmillisecond;

else this.timerecord.Text += "0" + outmillisecond;

else this.timerecord.Text += outmillisecond;

//输出毫秒

}

}

}

private void Immediate_Tick_1(object sender, EventArgs e)

{

this.timepresent.Text = "";

//计算时间

int rechour;

int recminute;

int recsecond;

int recmillisecond;

int outhour, outminute, outsecond, outmillisecond;

rechour = DateTime.Now.Hour;

recminute = DateTime.Now.Minute;

recsecond = DateTime.Now.Second;

recmillisecond = DateTime.Now.Millisecond;

outmillisecond = recmillisecond - startmillisecond;

if (outmillisecond < 0)

{

outmillisecond += 1000;

recsecond--;

}

outsecond = recsecond - startsecond;

if (outsecond < 0)

{

outsecond += 60;

recminute--;

}

outminute = recminute - startminute;

if (outminute < 0)

{

outminute += 60;

rechour--;

}

outhour = rechour - starthour;

{//输出时间

if (outhour == 0)

this.timepresent.Text += "00";

else

this.timepresent.Text += outhour;

this.timepresent.Text += ":";

//输出小时

if (outminute < 10)

if (outminute == 0) this.timepresent.Text += "00";

else this.timepresent.Text += "0" + outminute;

else this.timepresent.Text += outminute;

this.timepresent.Text += ":";

//输出分钟

if (outsecond < 10)

if (outsecond == 0) this.timepresent.Text += "00";

else this.timepresent.Text += "0" + outsecond;

else this.timepresent.Text += outsecond;

this.timepresent.Text += ":";

//输出秒

if (outmillisecond < 100)

if (outmillisecond < 10) this.timepresent.Text += "00" + outmillisecond;

else this.timepresent.Text += "0" + outmillisecond;

else this.timepresent.Text += outmillisecond;

//输出毫秒

}

}

}

}

然后是

program.cs的内容：

using System;

using System.Collections.Generic;

using System.Linq;

using System.Windows.Forms;

namespace StopWatchWindows

{

static class Program

{

/// <summary>

/// 应用程序的主入口点。

/// </summary>

[STAThread]

static void Main()

{

Application.EnableVisualStyles();

Application.SetCompatibleTextRenderingDefault(false);

Application.Run(new Form1());

}

}

}