这是最近课程设计做的一个小东西，贴出来，算法很是简单，但画图的一些方法还是值得看看的。
代码：
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace PINum
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Label label2;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.PictureBox pictureBox1;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.Label label1;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
Graphics g;
int xMin;
int yMax;
public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.label2 = new System.Windows.Forms.Label();
this.textBox2 = new System.Windows.Forms.TextBox();
this.pictureBox1 = new System.Windows.Forms.PictureBox();
this.button1 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.label1 = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// label2
//
this.label2.Location = new System.Drawing.Point(232, 32);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(48, 23);
this.label2.TabIndex = 11;
this.label2.Text = "圆周率";
//
// textBox2
//
this.textBox2.Location = new System.Drawing.Point(280, 32);
this.textBox2.Name = "textBox2";
this.textBox2.ReadOnly = true;
this.textBox2.Size = new System.Drawing.Size(128, 21);
this.textBox2.TabIndex = 10;
this.textBox2.Text = "";
//
// pictureBox1
//
this.pictureBox1.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
this.pictureBox1.Location = new System.Drawing.Point(48, 64);
this.pictureBox1.Name = "pictureBox1";
this.pictureBox1.Size = new System.Drawing.Size(360, 200);
this.pictureBox1.TabIndex = 9;
this.pic
