1.txt

将文本文挡的标识分开

                     }
                     else if(ch=='.')
                     {
                        state=6;
                     }
                     else{
                        state=0;
                        forward = forward - 1;
                        token[index]='\0';
                        index++;
                        flag=1;
                        output(flag);
                     }
             break;
             case 3: ch = Buffer[forward];                            /*寻找注释符的前半部分*/
                     if(ch=='*')
                     {
                        state=4;
                     }
                     else if(ch=='=')
                     {
                        state=0;
                        token[index]=ch;
                        index++;
                        token[index]='\0';
                        index++;
                        flag=2;
                        output(flag);
                     }
                     else{
                        token[index]='\0';
                        index++;
                        flag=2;
                        output(flag);
                        state=0;
                        forward = forward - 1;
                     }
             break;
             case 4: ch = Buffer[forward];
                     temp = forward - 1;
                     if(ch!='/')                                       /*寻找注释符后半部分*/
                        state=4;
                     else{
                        if(Buffer[temp]=='*')
                            state=0;
                        else{
                            printf("Remark symbol error!\n");
                            state=0;
                        }
                     }
             break;
             case 5: ch = Buffer[forward];
                     if(ch=='=')
                     {
                        state=0;
                        token[index]=ch;
                        index++;
                        token[index]='\0';
                        index++;
                        flag=2;
                        output(flag);
                     }
                     else if(ch=='+')
                     {
                        state=0;
                        token[index]=ch;
                        index++;
                        token[index]='\0';
                        index++;
                        flag=2;
                        output(flag);
                     }
                     else if(ch=='-')
                     {
                        state=0;
                        token[index]=ch;
                        index++;
                        token[index]='\0';
                        index++;
                        flag=2;
                        output(flag);
                     }
                     else{
                        token[index]='\0';
                        index++;
                        flag=2;
                        output(flag);
                        state=0;
                        forward = forward - 1;
                     }
             break;
             case 6: ch = Buffer[forward];
                     temp = forward - 1;
                     if(isdigit(ch))
                     {
                         token[index]=Buffer[temp];                   /*将'.'放入token*/
                         index++;
                         token[index]=ch;                         /*将该数字放入token*/
                         index++;
                         state=7;
                     }
                     else{
                         token[index]='\0';                       /*输出前面的数字*/
                         index++;
                         flag=1;
                         output(flag);
            
                         index=0;                                 /*输出'.'*/
                         token[index]=Buffer[temp];
                         token[index]='\0';
                         index++;
                         flag=2;
                         output(flag);

                         forward = forward - 1;
                         state=0;
                     }
             break;
             case 7: ch = Buffer[forward];
                     if(isdigit(ch))
                     {
                         state=7;
                         token[index]=ch;
                         index++;
                      }
                      else if(ch=='E'||ch=='e'){                  /*找到表示指数的E或e*/
                         state=8;
                         temp=forward;                        /*temp用于保存指向E或e的指针*/
                      }
                      else{
                         token[index]='\0';
                         index++;
                         flag=1;
                         output(flag);
                         state=0;
                         forward = forward - 1;
                      }
             break;
             case 8: ch = Buffer[forward];
          /*temp1=q;*/
                     if(ch=='+'||ch=='-')                        /*如果E或e后面跟着+或-*/
                     {
                         temp1=forward;                      /*用temp1保存指向+或-的指针*/
                         state=9;
                     }
                     else if(isdigit(ch)){                       /*如果E或e后面跟着一个数字*/
                         state=10;
                         token[index]=Buffer[temp];              /*将E或e放入token*/
                         index++;
                         token[index]=ch;                      /*将该数字放入token*/
                         index++;
                     }
                     else{                                       /*如果E或e后面跟着其他字符*/
                         token[index]='\0';                    /*输出前面的数*/
                         index++;
                         flag=1;
                         output(flag);
            
                         index=0;                              /*将E或e放入token,回退字符,转入状态1*/
                         token[index]=Buffer[temp];
                         index++;
                         forward = forward - 1;
                         state=1;                              /*转入状态1,判断字符串*/
                     }
             break;
             case 9: ch = Buffer[forward];
                     if(isdigit(ch))                            /*若E或e后面的+或-的后面跟一个数字*/
                     {
                         token[index]=Buffer[temp];             /*将E或e和+或-放入token*/
                         index++;
            /*printf("\ntemp is %c\n",temp->ch);*/
                         token[index]=Buffer[temp1];
                         index++;
            /*printf("\ntemp1 is %c\n",temp1->ch);*/
                         token[index]=ch;                     /*将该数字放入token*/
                         index++;
                         state=10;                            /*转入状态10*/
                     }
                     else{
                         token[index]='\0';                    /*输出前面的数*/
                         index++;
                         flag=1;
                         output(flag);
            
                         index=0;                              /*输出E或e*/
                         token[index]=Buffer[temp];
                         index++;
                         token[index]='\0';
                         index++;
                         flag=0;
                         output(flag);

                         index=0;
                         token[index]=Buffer[temp1];           /*将+或-放入token*/
                         index++;
                         if(ch=='=')                           /*判断+=或-=*/
                         {
                             token[index]=ch;
                             index++;
                             token[index]='\0';
                             index++;
                             flag=2;
                             output(flag);
                             state=0;
                         }
                         else{
                             token[index]='\0';
                             index++;
                             flag=2;
                             output(flag);
                             forward = forward - 1;
                             state=0;
                         }
                     }
             break;
             case 10: ch = Buffer[forward];
                      if(isdigit(ch))
                      {
                         token[index]=ch;
                         index++;
                         state=10;
                      }
                      else{
                         token[index]='\0';
                         index++;
                         flag=1;
                         output(flag);
                         forward = forward - 1;
                         state=0;
                     }
             break;
             case 11: ch = Buffer[forward];
                      if(ch=='|')
                      {
                         token[index]=ch;
                         index++;
                         token[index]='\0';
                         index++;
                         flag=2;
                         output(flag);
                         state = 0;
                      }
                      else
                      {
                         token[index]='\0';
                         index++;
                         flag=1;
                         output(flag);
                         forward = forward - 1;
                         state=0;
                      }
              break;
              case 12: ch = Buffer[forward];
                       if(ch=='&')
                       {
                         token[index]=ch;
                         index++;
                         token[index]='\0';
                         index++;
                         flag=2;
                         output(flag);
                         state = 0;
                       }
                       else
                      {
                         token[index]='\0';
                         index++;
                         flag=1;
                         output(flag);
                         forward = forward - 1;
                         state=0;
                      }
              break;
        }
    }

    printf("\nThe end!\nThe number of lines in this source file is %d.\n",lineno);
    fprintf(out,"\nThe end!\nThe number of lines in this source file is %d.\n",lineno);

    fclose(fp);
}

void print()
{
    struct entry *q;
    q=headOfEntry;
    printf("The followed is symbol list:\n");
    while(q->next!=NULL)
    {
        printf("(%d,%s)\n",q->next->attr,q->next->value);
        fprintf(out,"(%d,%s)\n",q->next->attr,q->next->value);
        q=q->next;
    }
}


main()
{
    char *in;
    char *outf;

    printf("Enter the name of Source file:\n");
    scanf("%s",in);
    printf("Enter the name of output file:\n");
    scanf("%s",outf);

    entryinit();

    outFile(outf);
    analyse(in);
    print();
    fclose(out);
    getch();
}