form1.cs

PL0语法分析器

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO	;

namespace 语法分析器
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	/// 
	public class Form1 : System.Windows.Forms.Form
	{
		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.textBox1 = new System.Windows.Forms.TextBox();
			this.List = new System.Windows.Forms.ListBox();
			this.label1 = new System.Windows.Forms.Label();
			this.button1 = new System.Windows.Forms.Button();
			this.label2 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.button2 = new System.Windows.Forms.Button();
			this.label5 = new System.Windows.Forms.Label();
			this.label4 = new System.Windows.Forms.Label();
			this.label6 = new System.Windows.Forms.Label();
			this.label7 = new System.Windows.Forms.Label();
			this.label8 = new System.Windows.Forms.Label();
			this.groupBox1 = new System.Windows.Forms.GroupBox();
			this.label11 = new System.Windows.Forms.Label();
			this.label10 = new System.Windows.Forms.Label();
			this.label9 = new System.Windows.Forms.Label();
			this.groupBox2 = new System.Windows.Forms.GroupBox();
			this.textBox3 = new System.Windows.Forms.TextBox();
			this.textBox2 = new System.Windows.Forms.TextBox();
			this.label14 = new System.Windows.Forms.Label();
			this.label13 = new System.Windows.Forms.Label();
			this.textBox4 = new System.Windows.Forms.TextBox();
			this.groupBox1.SuspendLayout();
			this.groupBox2.SuspendLayout();
			this.SuspendLayout();
			// 
			// textBox1
			// 
			this.textBox1.ForeColor = System.Drawing.Color.Maroon;
			this.textBox1.Location = new System.Drawing.Point(8, 32);
			this.textBox1.Multiline = true;
			this.textBox1.Name = "textBox1";
			this.textBox1.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
			this.textBox1.Size = new System.Drawing.Size(432, 72);
			this.textBox1.TabIndex = 0;
			this.textBox1.Text = "";
			// 
			// List
			// 
			this.List.ForeColor = System.Drawing.Color.Purple;
			this.List.HorizontalScrollbar = true;
			this.List.ItemHeight = 12;
			this.List.Location = new System.Drawing.Point(448, 32);
			this.List.Name = "List";
			this.List.Size = new System.Drawing.Size(168, 220);
			this.List.TabIndex = 1;
			// 
			// label1
			// 
			this.label1.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label1.ForeColor = System.Drawing.Color.Red;
			this.label1.Location = new System.Drawing.Point(24, 40);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(320, 32);
			this.label1.TabIndex = 2;
			this.label1.Text = "1、begin 2、const 3、call 4、do 5、end 6、if 7、var 8、procedure 9、read 10、then 11、while " +
				"12、write";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(456, 264);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(64, 24);
			this.button1.TabIndex = 3;
			this.button1.Text = "语法分析";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// label2
			// 
			this.label2.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label2.ForeColor = System.Drawing.Color.FromArgb(((System.Byte)(0)), ((System.Byte)(0)), ((System.Byte)(192)));
			this.label2.Location = new System.Drawing.Point(8, 8);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(152, 16);
			this.label2.TabIndex = 4;
			this.label2.Text = "请输入表达式：";
			// 
			// label3
			// 
			this.label3.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label3.ForeColor = System.Drawing.Color.FromArgb(((System.Byte)(0)), ((System.Byte)(0)), ((System.Byte)(192)));
			this.label3.Location = new System.Drawing.Point(448, 8);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(160, 16);
			this.label3.TabIndex = 5;
			this.label3.Text = "词法分析结果：";
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(544, 264);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(64, 24);
			this.button2.TabIndex = 6;
			this.button2.Text = "清除输入";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// label5
			// 
			this.label5.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label5.ForeColor = System.Drawing.Color.Red;
			this.label5.Location = new System.Drawing.Point(8, 24);
			this.label5.Name = "label5";
			this.label5.Size = new System.Drawing.Size(264, 16);
			this.label5.TabIndex = 8;
			this.label5.Text = "本词法分析器可分析基本字为：";
			// 
			// label4
			// 
			this.label4.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label4.ForeColor = System.Drawing.Color.Red;
			this.label4.Location = new System.Drawing.Point(8, 72);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(264, 16);
			this.label4.TabIndex = 9;
			this.label4.Text = "本词法分析器可分析运算符为：";
			// 
			// label6
			// 
			this.label6.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label6.ForeColor = System.Drawing.Color.Red;
			this.label6.Location = new System.Drawing.Point(24, 88);
			this.label6.Name = "label6";
			this.label6.Size = new System.Drawing.Size(288, 16);
			this.label6.TabIndex = 10;
			this.label6.Text = "1 +   2 -   3 *   4 /   5 =   6 #   7 <   8 >";
			// 
			// label7
			// 
			this.label7.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label7.ForeColor = System.Drawing.Color.Red;
			this.label7.Location = new System.Drawing.Point(8, 104);
			this.label7.Name = "label7";
			this.label7.Size = new System.Drawing.Size(264, 16);
			this.label7.TabIndex = 11;
			this.label7.Text = "本词法分析器可分析分界副为：";
			// 
			// label8
			// 
			this.label8.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label8.ForeColor = System.Drawing.Color.Red;
			this.label8.Location = new System.Drawing.Point(24, 120);
			this.label8.Name = "label8";
			this.label8.Size = new System.Drawing.Size(288, 16);
			this.label8.TabIndex = 12;
			this.label8.Text = "1 (   2 )   3 ,   4 ;   5 .   6 [   7 ]   8 :";
			// 
			// groupBox1
			// 
			this.groupBox1.Controls.Add(this.label11);
			this.groupBox1.Controls.Add(this.label10);
			this.groupBox1.Controls.Add(this.label9);
			this.groupBox1.Controls.Add(this.label5);
			this.groupBox1.Controls.Add(this.label1);
			this.groupBox1.Controls.Add(this.label7);
			this.groupBox1.Controls.Add(this.label8);
			this.groupBox1.Controls.Add(this.label4);
			this.groupBox1.Controls.Add(this.label6);
			this.groupBox1.ForeColor = System.Drawing.Color.FromArgb(((System.Byte)(0)), ((System.Byte)(0)), ((System.Byte)(192)));
			this.groupBox1.Location = new System.Drawing.Point(8, 224);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(432, 144);
			this.groupBox1.TabIndex = 13;
			this.groupBox1.TabStop = false;
			this.groupBox1.Text = "使用说明";
			// 
			// label11
			// 
			this.label11.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label11.ForeColor = System.Drawing.Color.Blue;
			this.label11.Location = new System.Drawing.Point(328, 120);
			this.label11.Name = "label11";
			this.label11.Size = new System.Drawing.Size(96, 16);
			this.label11.TabIndex = 15;
			this.label11.Text = "(种类号，序号)";
			// 
			// label10
			// 
			this.label10.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label10.ForeColor = System.Drawing.Color.Green;
			this.label10.Location = new System.Drawing.Point(352, 16);
			this.label10.Name = "label10";
			this.label10.Size = new System.Drawing.Size(72, 16);
			this.label10.TabIndex = 14;
			this.label10.Text = "单词种类：";
			// 
			// label9
			// 
			this.label9.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label9.ForeColor = System.Drawing.Color.Green;
			this.label9.Location = new System.Drawing.Point(352, 32);
			this.label9.Name = "label9";
			this.label9.Size = new System.Drawing.Size(72, 80);
			this.label9.TabIndex = 13;
			this.label9.Text = "1是基本字     2是运算符      3是标识符     4是常数     5是界符       6是无用字符";
			// 
			// groupBox2
			// 
			this.groupBox2.Controls.Add(this.textBox3);
			this.groupBox2.Controls.Add(this.textBox2);
			this.groupBox2.Controls.Add(this.label14);
			this.groupBox2.Controls.Add(this.label13);
			this.groupBox2.ForeColor = System.Drawing.Color.FromArgb(((System.Byte)(0)), ((System.Byte)(0)), ((System.Byte)(192)));
			this.groupBox2.Location = new System.Drawing.Point(8, 112);
			this.groupBox2.Name = "groupBox2";
			this.groupBox2.Size = new System.Drawing.Size(432, 104);
			this.groupBox2.TabIndex = 15;
			this.groupBox2.TabStop = false;
			this.groupBox2.Text = "用户自定义数据";
			// 
			// textBox3
			// 
			this.textBox3.BackColor = System.Drawing.SystemColors.HighlightText;
			this.textBox3.ForeColor = System.Drawing.Color.Purple;
			this.textBox3.Location = new System.Drawing.Point(56, 56);
			this.textBox3.Multiline = true;
			this.textBox3.Name = "textBox3";
			this.textBox3.ReadOnly = true;
			this.textBox3.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
			this.textBox3.Size = new System.Drawing.Size(368, 40);
			this.textBox3.TabIndex = 3;
			this.textBox3.Text = "";
			// 
			// textBox2
			// 
			this.textBox2.BackColor = System.Drawing.Color.White;
			this.textBox2.ForeColor = System.Drawing.Color.Purple;
			this.textBox2.Location = new System.Drawing.Point(56, 16);
			this.textBox2.Multiline = true;
			this.textBox2.Name = "textBox2";
			this.textBox2.ReadOnly = true;
			this.textBox2.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
			this.textBox2.Size = new System.Drawing.Size(368, 40);
			this.textBox2.TabIndex = 2;
			this.textBox2.Text = "";
			// 
			// label14
			// 
			this.label14.Location = new System.Drawing.Point(8, 56);
			this.label14.Name = "label14";
			this.label14.Size = new System.Drawing.Size(48, 16);
			this.label14.TabIndex = 1;
			this.label14.Text = "常 数：";
			// 
			// label13
			// 
			this.label13.Location = new System.Drawing.Point(8, 24);
			this.label13.Name = "label13";
			this.label13.Size = new System.Drawing.Size(56, 16);
			this.label13.TabIndex = 0;
			this.label13.Text = "标示符：";
			// 
			// textBox4
			// 
			this.textBox4.Location = new System.Drawing.Point(456, 304);
			this.textBox4.Multiline = true;
			this.textBox4.Name = "textBox4";
			this.textBox4.ReadOnly = true;
			this.textBox4.Size = new System.Drawing.Size(152, 56);
			this.textBox4.TabIndex = 16;
			this.textBox4.Text = "";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.AutoScroll = true;
			this.ClientSize = new System.Drawing.Size(624, 374);
			this.Controls.Add(this.textBox4);
			this.Controls.Add(this.groupBox2);
			this.Controls.Add(this.groupBox1);
			this.Controls.Add(this.button2);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.button1);
			this.Controls.Add(this.List);
			this.Controls.Add(this.textBox1);
			this.MaximizeBox = false;
			this.MaximumSize = new System.Drawing.Size(720, 592);
			this.MinimumSize = new System.Drawing.Size(200, 200);
			this.Name = "Form1";
			this.Text = "PL/0表达式分析 C#实现（02122984 郑刚）";
			this.groupBox1.ResumeLayout(false);
			this.groupBox2.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion
		public class KeyAnalyze
		{
			private string [] keytxt =new string[]{	"begin","const","call","do","end","if","var",
													  "procedure","read","then","while","write"};
			//基本字
			private string [] optxt=new string []{"+","-","*","/","=","#","<",">"};
			//运算符
			private string [] eoptxt=new string []{"(",")",",",";",".","[","]",":"};
			//界符
			private string keybuffer;
			//字符缓冲区
			public ArrayList ResultList=new ArrayList(); //结果存放区
			public ArrayList NumList=new ArrayList(); //常数存放区
			public string ResultNum;//所有常数输出存放区
			public ArrayList IdList=new ArrayList(); //标识符存放区
			public string ResultId;//所有标示符输出存放区
			public bool IsKey(string a) 
			{
				foreach(string b in keytxt)
				{