by.java

此程序使用在java环境下开发的

package bianyi;

import java.io.*;
import java.util.*;

public class BY {
    public static void main(String[] args) throws IOException {
     String cache;
     int x=0;
     Queue<String> words=new LinkedList<String>();
     DefinitionList.setdoubleDelimiter();
     DefinitionList.setreserved();
     DefinitionList.setsingledelimiter();
     File readSource=new File("Hello.txt");
     File errorMessage=new File("Error.txt");
    if(!errorMessage.exists())  errorMessage.createNewFile();
     PrintWriter puterror=new PrintWriter(new FileOutputStream(errorMessage));
     File code=new File("Code.txt");
     if(!code.exists()) code.createNewFile();
     PrintWriter putCode=new PrintWriter(new FileOutputStream(code));
     File divided=new File("divided.txt");
     if(!divided.exists())  divided.createNewFile();
     PrintWriter putwords=new PrintWriter(new FileOutputStream(divided));
      System.out.println(readSource.getAbsolutePath());
      Scanner in = new Scanner(readSource);
       cache="";
       int line=0;
     while (in.hasNextLine())
     {      line++;
            String temp = in.nextLine();
            int h=0,t=2,i=1,m=temp.length();
            while(t<temp.length())
                 { if(temp.substring(h,t).equals("/*")) {i*=-1;m=h;break;}h++;t++;
                    }
            while(t<temp.length())
                 { if(temp.substring(h,t).equals("*/")) {i*=-1;}h++;t++;
                    }
             if(i<0)
               {puterror.print("错误"+"\r\t"+"第"+line+"行注释出错"+"\r\n");
                 }
                temp=temp.substring(0,m);
            h=0;t=h;i=1;
           while(h<temp.length()) 
                 { if(temp.charAt(h)=='"') {i*=-1;t=h;}h++; 
                    }
            if(i<0)
                 {
                 puterror.print("错误"+"\r\t"+"第"+line+"行字符串常数错误，缺少引号"+"\r\n");
                  String temp2="";
                  while(temp.charAt(t)!=')'&&temp.charAt(t)!=';')
                          {t++;}
                  temp2=temp.substring(t,temp.length());temp=temp.substring(0,t);
                  temp+='"';
                  temp+=temp2;
                 }
            h=0;
            while(h<temp.length())
            {  if(!(Judge.figure(temp.charAt(h))||Judge.letter(temp.charAt(h))||Judge.denotation(temp.charAt(h))||temp.charAt(h)==' '))
                  {m=h+1;
                   puterror.print("错误"+"\r\t"+"第"+line+"行第"+m+"列出现非法符号"+temp.charAt(h)+"\r\n");
                   String temp2=temp.substring(h+1,temp.length());temp=temp.substring(0,h);
                   temp+=temp2;
                  }
               h++;
            }
           h=0;
            while(h<temp.length()-1)
            {  if(Judge.figure(temp.charAt(h))&&Judge.letter(temp.charAt(h+1)))
                  {m=h;
                   puterror.print("错误"+"\r\t"+"第"+line+"行第"+m+"列出现非法标识符"+temp.substring(h,h+2)+"\r\n");
                   String temp2=temp.substring(h+1,temp.length());temp=temp.substring(0,h+1);
                   temp+=';';
                   temp+=temp2;
                   }
               h+=1;
            }
            cache += temp;    
        }
       puterror.close();
       System.out.println(cache);
      int head=0,tail=1;
      while(tail<cache.length())
       {   
         if(cache.charAt(head)==' ')
             { while(cache.charAt(tail)==' ')
                  { tail++;}
               head=tail;tail++;
              }
         if(Judge.letter(cache.charAt(head)))
            { while(Judge.letter(cache.charAt(tail))||Judge.figure(cache.charAt(tail))) 
                   {tail++;}
              words.offer(cache.substring(head,tail));
              x++;
              putwords.print(x+"\t");
              putwords.print(cache.substring(head,tail)+"\r\n");head=tail;tail++;
             }
         if(Judge.figure(cache.charAt(head)))
             { while(Judge.figure(cache.charAt(tail)))
                   {tail++;}
               words.offer(cache.substring(head,tail));
              x++;
               putwords.print(x+"\t");
              putwords.print(cache.substring(head,tail)+"\r\n");head=tail;tail++;
              }
         if(Judge.denotation(cache.charAt(head)))
             { if(Judge.denotation(cache.charAt(tail))&&DefinitionList.doubledelimiter.contains(cache.substring(head,tail+1)))
                   {tail++;}
               words.offer(cache.substring(head,tail));
              x++;
               putwords.print(x+"\t");
               putwords.print(cache.substring(head,tail)+"\r\n");head=tail;tail++;
              }
         if(cache.charAt(head)=='"')
             { words.offer(cache.substring(head,tail));
              x++;
               putwords.print(x+"\t");
               putwords.print(cache.substring(head,tail)+"\r\n");head=tail;tail++;
               while(cache.charAt(tail)!='"')
               {
                 tail++;}
               words.offer(cache.substring(head,tail));
              x++;
               putwords.print(x+"\t");
               putwords.print(cache.substring(head,tail)+"\r\n");head=tail;tail++;
               words.offer(cache.substring(head,tail));
              x++;
               putwords.print(x+"\t");
               putwords.print(cache.substring(head,tail)+"\r\n");head=tail;tail++;
              }
       }
       words.offer(cache.substring(head,tail));
              x++;
       putwords.print(x+"\t");
       putwords.print(cache.substring(head,tail)+"\r\n");
       putwords.close(); 
       System.out.println(words);
       int a=10;
      String str;
        while((str=words.poll())!=null){
         if (DefinitionList.reserved.contains(str)) 
          {     putCode.print(str+"\t\t\t");
                putCode.print("(" + (DefinitionList.reserved.indexOf(str) + 1) + ", -)" +"\r\n");
            }
         else if(!DefinitionList.reserved.contains(str)&&(Judge.letter(str.charAt(0))))
            {   putCode.print(str+"\t\t\t");
                DefinitionList.setidentifier(str);
                putCode.print("(34,"+(DefinitionList.identifier.indexOf(str)+1)+")"+"\r\n");
            }
         if ((Judge.figure(str.charAt(0)))) 
            {   putCode.print(str+"\t\t\t");
                DefinitionList.setfigure(str);
                putCode.print("(36,"+(DefinitionList.figure.indexOf(str)+1)+")"+"\r\n");
            }
            if (DefinitionList.singledelimiter.contains(str)) 
               {    putCode.print(str+"\t\t\t");
                    putCode.print("("+(DefinitionList.singledelimiter.indexOf(str)+39)+",-)"+"\r\n"); //单字符39-58；
                }
             if (DefinitionList.doubledelimiter.contains(str)) 
                {   putCode.print(str+"\t\t\t");
                    putCode.print("("+(DefinitionList.doubledelimiter.indexOf(str)+59)+",-)"+"\r\n");  //双字符59-68；
                }
                }
           putCode.close();
         }

   }