bianyi.txt

编译原理课程设计的源码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
namespace 词法
{
    public partial class Form1 : Form
    {
        string[] key = new string[]{"abstract","as","base","bool","break","byte","case", "main","catch","char","checked","class","const","continue","decimal" ,
"default","delegate","do","double","else","enum","event" ,
"explicit","extern","false","finally","fixed","float","for" ,
"foreach","goto","if","implicit","in","int","interface",
"internal","is","long","namespace","new","null","object",
"operator","out","override","params","private","protected", "public","ref","return","sealed","short" , "sizeof","static","string","struct","switch","this",
"throw","true","try","typeof","using","virtual","void","while" };//关键字
        string[] keys = new string[100];
        string[] other = new string[100];
        char[] danzf = new char[100];
 char[] fenjiefu = new char[] { ' ', ',', '.', ';', '(', ')', '{', '}', '"', '[', ']' };//分界,
 string[] dk = null;
        char[] yunsuan = new char[] { '+', '-', '*', '/', '<', '>', '=' };//比较运算符
        public Form1()
        {
            InitializeComponent();
        }
        private void label1_Click(object sender, EventArgs e)
        {
        }
        private void label2_Click(object sender, EventArgs e)
        {
        }
        private void button3_Click(object sender, EventArgs e)
        {
            this.Close();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            this.Hide();
            Form1 f = new Form1();
            f.Show();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            int m = 0;
            int n = 0;
            string fenxichuan = textBox2.Text;
            char[] huafen = new char[] { ' ', ',', '.', ';', '(', ')', '{', '}', '"', '[', ']', '+', '-', '*', '/', '<', '>', '=' };
            for (int x = 0; x < fenxichuan.Length; x++)
                dk = fenxichuan.Split(huafen, x);   //用分界符分割输入串
            StringReader fdc = new StringReader(fenxichuan);
            fdc.Read(danzf, 0, textBox2.Text.Length);          //得到字符串中的单个字符

            for (int w = 0; w < dk.Length; w++)
            {
                foreach (string k in key)
                {
                    if (k == dk[w])
                    {
                        keys[m] = dk[w];
                        m++;
                        dk[w] = "";
                    }
                }
            }                      //分析出关键字
            foreach (string ww in dk)
            {
                int k = 0;
                int y = 0;
                if (ww != " ")
                {
                    for (; k <= fenjiefu.Length; )
                    {
                        if (ww != "fenjiefu[k]" && ww != "yunsuan[y]") { k++; y++; }
                        else break;
                    }
                    if (k > fenjiefu.Length)
                    {
                        other[n] = ww;
                        n++;                  //将除关键字，界符，等输出。
                    }
                }
            }
            foreach (string cc in keys)
            {
                textBox1.Text = textBox1.Text + cc + '\t';//将分析串中的关键字输出   
            }
            foreach (string ccc in other)
            {
                textBox3.Text = textBox3.Text + ccc + " ";  //将除关键字，界符，等输出。
            }
            foreach (char zm in danzf)
            {
                foreach (char suan in yunsuan)
                    if (zm == suan)
                    {
                        textBox4.Text += zm;
                    }
            }
            foreach (char zm in danzf)
            {
                foreach (char fen in fenjiefu)
                    if (zm == fen)
                    {
                        textBox5.Text += zm;
                        textBox5.Text += " ";
                    }
            }
        }
    }
}