ch=fgetc(input);
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(左括號運(yùn)算符\t,%-16s)\t%4d\n",count,token,i);
   continue;
   }
  else if(ch==‘[‘)
   {
   token[i++]=ch;
   ch=fgetc(input);
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(右中括號運(yùn)算符\t,%-16s)\t%4d\n",count,token,i);
   continue;
   }
  else if(ch==‘]‘)
   {
   token[i++]=ch;
   ch=fgetc(input);
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(左中括號運(yùn)算符\t,%-16s)\t%4d\n",count,token,i);
   continue;
   }
  else if(ch==‘-‘)
   {
   token[i++]=ch;
   ch=fgetc(input);
   if(ch==‘-‘)
    {
    token[i++]=ch;
    token[i]=‘\0‘;
    count++;fprintf(output,"%4d\t(自加運(yùn)算符\t,%-16s)\t%4d\n",count,token,i);
    ch=fgetc(input);
    continue;
    }
   else if (ch==‘>‘)
    {
    token[i++]=ch;
    token[i]=‘\0‘;
    count++;fprintf(output,"%4d\t(指針運(yùn)算符\t,%-16s)\t%4d\n",count,token,i);
    ch=fgetc(input);
    continue;
    }
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(負(fù)運(yùn)算符\t,%-16s)\t%4d\n",count,token,i);
   continue;
   }
  else if(ch==‘.‘)
   {
   token[i++]=ch;
   ch=fgetc(input);
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(點(diǎn)運(yùn)算符\t,%-16s)\t%4d\n",count,token,i);
   continue;
   }
  else if(ch==‘&‘)  
   {
   token[i++]=ch;
   ch=fgetc(input);
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(地址與運(yùn)算符\t,%-16s)\t%4d\n",count,token,i);
   continue;   
   }
  else if(ch==‘!‘)  
   {
   token[i++]=ch;
   ch=fgetc(input);
   if(ch==‘=‘)
    {
    token[i++]=ch;
    token[i]=‘\0‘;
    count++;fprintf(output,"%4d\t(不等于比較符\t,%-16s)\t%4d\n",count,token,i);
    ch=fgetc(input);
    continue;
    }
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(取反運(yùn)算符\t,%-16s)\t%4d\n",count,token,i);
   continue;   
   }
  else if(ch==‘~‘)  
   {
   token[i++]=ch;
   ch=fgetc(input);
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(按位運(yùn)算符\t,%-16s)\t%4d\n",count,token,i);
   continue;   
   }
  else if(ch==‘*‘)
   {
   token[i++]=ch;
   ch=fgetc(input);
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(乘運(yùn)算符\t,%-16s)\t%4d\t\n",count,token,i);
   continue;   
   }
  else if(ch==‘%‘)  
   {
   token[i++]=ch;
   ch=fgetc(input);
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(求余運(yùn)算符\t,%-16s)\t%4d\n",count,token,i);
   continue;   
   }
  else if(ch==‘/‘)  
   {
   token[i++]=ch;
   ch=fgetc(input);
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(除法運(yùn)算符\t,%-16s)\t%4d\t\n",count,token,i);
   continue;   
   }  
  else if(ch==‘<‘)
   {
   token[i++]=ch;
   ch=fgetc(input);
   if(ch==‘=‘)
    {
    token[i++]=ch;
    token[i]=‘\0‘;
    count++;fprintf(output,"%4d\t(小于等于比較符\t,%-16s)\t%4d\n",count,token,i);
    ch=fgetc(input);
    continue;
    }
   if(ch==‘<‘)
    {
    token[i++]=ch;
    token[i]=‘\0‘;
    count++;fprintf(output,"%4d\t(左移運(yùn)算符\t,%-16s)\t%4d\t\n",count,token,i);
    ch=fgetc(input);
    continue;
    }
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(小于比較符\t,%-16s)\t%4d\n",count,token,i);
   continue;
   }
  else if(ch==‘>‘)
   {
   token[i++]=ch;
   ch=fgetc(input);
   if(ch==‘=‘)
    {
    token[i++]=ch;
    token[i]=‘\0‘;
    count++;fprintf(output,"%4d\t(大于等于比較符\t,%-16s)\t%4d\n",count,token,i);
    ch=fgetc(input);
    continue;
    }
   if(ch==‘>‘)
    {
    token[i++]=ch;
    token[i]=‘\0‘;
    count++;fprintf(output,"%4d\t(右移運(yùn)算符\t,%-16s)\t%4d\n",count,token,i);
    ch=fgetc(input);
    continue;
    }
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(大于比較符\t,%-16s)\t%4d\n",count,token,i);
   continue;
   }
  else if(ch==‘=‘)
   {
   token[i++]=ch;
   ch=fgetc(input);
   if(ch==‘=‘)
    {
    token[i++]=ch;
    token[i]=‘\0‘;
    count++;fprintf(output,"%4d\t(等于比較符\t,%-16s)\t%4d\n",count,token,i);
    ch=fgetc(input);
    continue;
    }
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(賦值運(yùn)算符\t,%-16s)\t%4d\n",count,token,i);
   continue;
   }
  else if(ch==‘,‘)
   {
   token[i++]=ch;
   ch=fgetc(input);
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(逗號界符\t,%-16s)\t%4d\n",count,token,i);
   continue;
   } 
  else if(ch==‘;‘)
   {
   token[i++]=ch;
   ch=fgetc(input);
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(分號界符\t,%-16s)\t%4d\n",count,token,i);
   continue;
   }
  
  else if(ch==‘{‘)
   {
   token[i++]=ch;
   ch=fgetc(input);
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(邊界運(yùn)算符\t,%-16s)\t%4d\n",count,token,i);
   continue;
   }
  else if(ch==‘}‘)
   {
   token[i++]=ch;
   ch=fgetc(input);
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(邊界運(yùn)算符\t,%-16s)\t%4d\n",count,token,i);
   continue;
   }
  else if(ch==‘+‘)
   { 
   token[i++]=ch;
   ch=fgetc(input);
   if(ch==‘+‘)
    {
    token[i++]=ch;
    token[i]=‘\0‘;
    count++;fprintf(output,"%4d\t(自加運(yùn)算符\t,%-16s)\t%4d\n",count,token,i);
    ch=fgetc(input);
    continue;
    }
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(加運(yùn)算符\t,%-16s)\t%4d\n",count,token,i);
   continue;
   }
  else if(ch==‘"‘)
   { 
   token[i++]=ch;
   ch=fgetc(input);
   while(ch!=‘"‘&&ch!=EOF)
    {
    token[i++]=ch;
    ch=fgetc(input);    
    }
   if(ch==‘"‘)
    {
    token[i++]=ch;
    ch=fgetc(input);
    token[i]=‘\0‘;
    count++;fprintf(output,"%4d\t(字符串\t\t,%-16s)\t%4d\n",count,token,i);
    continue;
    }
   else
    {
    while(ch!=EOF)
    {
    token[i++]=ch;
    ch=fgetc(input);
    }
    token[i]=‘\0‘;
    count++;fprintf(output,"%4d\t(字符串錯誤\t,%-16s)\t%4d\n",count,token,i);
    }
   } 
  else
   {
   while(ch!=‘ ‘&&ch!=‘\t‘&&ch!=‘\n‘&&ch!=EOF)
   {
    token[i++]=ch;
    ch=fgetc(input);
   }
   token[i]=‘\0‘;
   count++;fprintf(output,"%4d\t(無法識別錯誤\t,%-16s)\t%4d\n",count,token,i);
   continue;
   }
  }
 fclose(input);
 fclose(output);
}

/*判斷是不是關(guān)鍵字:
　1,則是標(biāo)識符
　0,則是關(guān)鍵字
  2,則是運(yùn)算符
 */

int reserver(char *str)
{
 FILE *fpReserver;
 char *tmpStr=‘\0‘;

 if(strcmp(str,"sizeof")==0)
  return 2;
 /*打開關(guān)鍵字文件*/
 if((fpReserver=fopen("keyword.txt","r"))==NULL)
 { printf("file open in readonly mode,but an error generate!\n");
  exit(0);
 }
 while(fscanf(fpReserver,"%s",tmpStr)!=EOF)
  if(strcmp(str,tmpStr)==0)
   {fclose(fpReserver);return 0;}
 fclose(fpReserver);
 return 1; 
} 


/*

輸入文件input.txt

#include<stdio.h>

void E(char *);
void E1(char *);
void T(char *);
void T1(char *);
void F(char *);

void main()
{
 char *str="i+(i*i";
 printf("%s\n",str);
 E(str);
}

void E(char *str)
{
 T(str);
 printf("1%s\n",str);
 E1(str);
 printf("2%s\n",str);
}

void E1(char *str)
{
 if (*str==‘+‘)
 {
  str++;
  T(str);
  E1(str);
 }

}

void T(char *str)
{
 F(str);
 T1(str);
}
void T1(char *str)
{
 if(*str==‘*‘)
  {
   str++;
   F(str);
   T1(str);
  }
}

void F(char *str)
{
 if(*str==‘(‘)
 {
  str++;
  E(str);
  if(*str==‘)‘)
   str++;
  else
  {
   printf("lost ‘)‘\n");
   exit(0);
  }
 }
 else if(*str==‘i‘)
  str++;
      else
  {
   printf("lost variable\n");
   exit(0);
  }
}

*/

/*

關(guān)鍵字文件keyword.txt

auto  break  case  char  const
continue default  do  double  else
enum  extern  float  for  goto
if  int  long  register return 
short  signed  sizeof  static  struct
switch  typedef  union  unsigned void
volatile while

*/