form1.cs
来自「实现了此法分析器和语法分析器 有详细的代码和文档」· CS 代码 · 共 2,012 行 · 第 1/5 页
CS
2,012 行
using System;
using System.IO;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace program2
{
public partial class Form1 : Form
{
private string path;
public Form1()
{
InitializeComponent();
path = Directory.GetCurrentDirectory();
}
public string[,] strArray1 = new string[1000, 2];
public string[,] strArray2 = new string[16, 2];
public char[] char1;
public string str2 = "", c1;
public static int j = 0, m = 1, e = 0;
public static int n = 0;
public int f = 1, h = 1, g = 1;
public int ascii;
//词法分析器----------------------------------------------------------------------------------------------------------------------------------------------
private void button1_Click(object sender, EventArgs e)
{
mpname();
}
private void button2_Click(object sender, EventArgs e)
{
int i,k;
for (i = 0; i < 1000; i++)
{
for (k = 0; k < 2; k++)
{
strArray1[i, k] = "";
}
}
str2 = "";
char1 = richTextBox1.Text.ToCharArray();
getchar();
}
public void scan()//拼读一个单词模块
{
if (ascii <= 122 & ascii >= 97 | ascii <= 90 & ascii >= 65) // ASCII A-Z/a-z=65-90/97-122
{
if (h == 0)//上一个字符是数字
{
j = j + 1;
str2 = "";
str2 = str2 + c1;
strArray1[j, 0] = str2;
strArray1[j, 1] = "17";//字母数字串
h = 1; //h为字母数字串字母与数字拼接时的接口
f = 1; //f为区分一行的开始是字母还是空格的标志量
g = 0; //g为数字字母串数字与字母断开时的接口
}
else
{
str2 = str2 + c1;
strArray1[j, 0] = str2;
strArray1[j, 1] = "17";//字母串
look(j);
f = 0;
g = 0;
}
}
else if (ascii <= 57 & ascii >= 48) // ASCII 0-9=48-57
{
if (g == 0)//上一个字符是字母
{
str2 = str2 + c1;
strArray1[j, 0] = str2;
strArray1[j, 1] = "17";//字母串
h = 0;
f = 0;
}
else
{
str2 = str2 + c1;
strArray1[j, 0] = str2;
strArray1[j, 1] = "18";//数字串
h = 0;
f = 0;
}
}
else if (c1 == "<")
{
if (f == 0)
{
j = j + 1;
}
strArray1[j, 0] = c1;
strArray1[j, 1] = "28";//"<"
j = j + 1;
str2 = "";
g = 1;
}
else if (c1 == ">")
{
if (strArray1[j - 1, 0] == "<")
{
j = j - 1;
strArray1[j, 0] = strArray1[j, 0] + c1;
strArray1[j, 1] = "25";//"<>"
j = j + 1;
g = 1;
}
else
{
if (f == 0)
{
j = j + 1;
}
strArray1[j, 0] = c1;
strArray1[j, 1] = "26";//">"
j = j + 1;
str2 = "";
g = 1;
}
}
else if (c1 == "+")
{
if (f == 0)
{
j = j + 1;
}
strArray1[j, 0] = c1;
strArray1[j, 1] = "19";//"+"
j = j + 1;
str2 = "";
g = 1;
f = 1;
h = 1;
}
else if (c1 == "-")
{
if (f == 0)
{
j = j + 1;
}
str2 = c1;
strArray1[j, 0] = c1;
strArray1[j, 1] = "20";//"-"
j = j + 1;
str2 = "";
g = 1;
f = 1;
h = 1;
}
else if (c1 == "*")
{
if (f == 0)
{
j = j + 1;
}
strArray1[j, 0] = c1;
strArray1[j, 1] = "21";//"*"
j = j + 1;
str2 = "";
g = 1;
f = 1;
h = 1;
}
else if (c1 == "/")
{
if (f == 0)
{
j = j + 1;
}
strArray1[j, 0] = c1;
strArray1[j, 1] = "22";//"/"
j = j + 1;
str2 = "";
g = 1;
f = 1;
h = 1;
}
else if (c1 == ":")
{
if (f == 0)
{
j = j + 1;
}
strArray1[j, 0] = c1;
strArray1[j, 1] = "0";
j = j + 1;
str2 = "";
}
else if (c1 == "=")
{
if (strArray1[j - 1, 0] == ":" | strArray1[j - 1, 0] == "<" | strArray1[j - 1, 0] == ">")
{
j = j - 1;
strArray1[j, 0] = strArray1[j, 0] + c1;
if (strArray1[j, 0] == ":=")
strArray1[j, 1] = "23";
if (strArray1[j, 0] == "<=")
strArray1[j, 1] = "29";
if (strArray1[j, 0] == ">=")
strArray1[j, 1] = "27";
j = j + 1;
g = 1;
f = 1;
}
else
{
if (f == 0)
{
j = j + 1;
}
strArray1[j, 0] = c1;
strArray1[j, 1] = "24";
j = j + 1;
str2 = "";
g = 1;
}
}
else if (c1 == ",")
{
if (f == 0)
{
j = j + 1;
}
strArray1[j, 0] = c1;
strArray1[j, 1] = "32";
j = j + 1;
f = 1;
h = 1;
str2 = "";
}
else if (c1 == ";")
{
if (f == 0)
{
j = j + 1;
}
strArray1[j, 0] = c1;
strArray1[j, 1] = "33";
str2 = "";
h = 1;
}
else if (c1 == "(")
{
if (f == 0)
{
j = j + 1;
}
strArray1[j, 0] = c1;
strArray1[j, 1] = "30";
str2 = "";
j = j + 1;
f = 1;
g = 1;
h = 1;
}
else if (c1 == ")")
{
if (f == 0)
{
j = j + 1;
}
strArray1[j, 0] = c1;
strArray1[j, 1] = "31";
str2 = "";
g = 1;
h = 1;
}
else if (c1 == ".")
{
if (f == 0)
{
j = j + 1;
}
strArray1[j, 0] = c1;
strArray1[j, 1] = "34";
str2 = "";
}
else if (c1 == "\n")
{
if (f == 0 | h==0 )
{
j = j + 1;
}
strArray1[j, 0] = "Enter";
strArray1[j, 1] = "35";
str2 = "";
j = j + 1;
m = m + 1;
f = 1;
if (h == 0)
h = 1;
}
else if (c1 == " ")
{
g = 1;
getbc();
}
else
{
error();
}
getchar();
}
public void look(int v)//查保留字表模块
{
int u;
for (u = 0; u < 16; u++)
{
if (strArray1[v, 0] == strArray2[u, 1])
{
strArray1[v, 1] = strArray2[u, 0];
break;
}
}
}
public void error()//错误处理模块
{
string m1 = "";
m1 = m.ToString();
MessageBox.Show("在第" + m1 + "行有非法字符“" + c1 + "”");
StreamWriter e_SW = new StreamWriter(path+@"\file\error.txt", true);
e_SW.WriteLine("在第" + m1 + "行有非法字符“" + c1 + "”");
e_SW.Close();
}
public void getbc()//剔除空格模块
{
if (f == 0)
{
j = j + 1;
f = 1;
}
str2 = "";
}
public void getchar()//从源程序文件读一个字符模块
{
if (n <= char1.Length - 1)
{
c1 = char1[n].ToString();
c1 = c1.ToLower();
ASCIIEncoding asciiencoding = new ASCIIEncoding();
ascii = (int)asciiencoding.GetBytes(char1)[n];
n = n + 1;
scan();
}
else
{
n = 0;
Outword();
}
}
public void mpname()//判断源程序文件是否存在模块
{
FileInfo m_FileInfo = new FileInfo(path+@"\file\" + textBox1.Text);
if (m_FileInfo.Exists)
{
StreamReader m_SR = new StreamReader(path+@"\file\" + textBox1.Text);
string m_Data = m_SR.ReadToEnd();
richTextBox1.Text = m_Data;
m_SR.Close();
}
else
{
MessageBox.Show("源文件不存在！");
}
}
public void Outword()//输出单词模块
{
int i;
string str1 = "";
for (i = 0; i <= j; i++)
{
StreamWriter m_SW = new StreamWriter(path+@"\file\456.txt", true);
m_SW.WriteLine(strArray1[i, 0] + " " + strArray1[i, 1]);
m_SW.Close();
str1 = str1 + strArray1[i, 0] + " " + strArray1[i, 1] + "\n";
}
j = 0;
richTextBox2.Text = str1;
}
public void initiate()//初始化模块
{
int u, v;
StreamWriter m_SW = new StreamWriter(path+@"\file\456.txt", false);
m_SW.WriteLine();
m_SW.Close();
StreamWriter e_SW = new StreamWriter(path+@"\file\error.txt", false);
e_SW.WriteLine();
e_SW.Close();
StreamWriter y_SW = new StreamWriter(path+@"\file\yuan4.txt", false);
y_SW.WriteLine();
y_SW.Close();
StreamReader n_SR = new StreamReader(path+@"\file\word.txt");
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