flex中的注释

flex 2.5.35
论文写到此处，遇到点麻烦，随手翻了本书，说下flex中的注释问题。中文版的35页有点问题，所以纠正下。

下面是p31示例 fb2_2.l

 /* 读取多个文件 */
 %option noyywrap

 %{
 int chars = ;
 int words = ;
 int lines = ;                                                                                                             

 int  totchars = ;
 int  totwords = ;
 int  totlines = ;
 %}

 %%
15 ♥//匹配字符串  ♥ 表示空格
16 [a-zA-Z]+ { //习惯C风格，所以写成了这样
     {  //原因：参见中文版 p9 倒数第9行中括号内的文字
         words++; chars += strlen(yytext);
     }
     }

22 ♥  /*匹配
23 ♥   *换行符
24 ♥   */
 \n {
     {
         chars++; lines++;
     }
     }

31 ♥  /* 其它 */
 . {
     {
         chars++;
     }
     }

 %%

 int main(int argc, char **argv)
 {
     int i;
     if (argc < )
     {
         yylex();
         printf("lines:  %8d\n"
                "words:  %8d\n"
                "chars:  %8d\n",
                lines, words, chars);
         return ;
     }

     for (i = ; i < argc; i++)
     {
         FILE *f = fopen(argv[i], "r");                                                                                     

         if (!f)
         {
             perror(argv[i]);
             return ;
         }
         yyrestart(f);
         yylex();
         fclose(f);
         printf("lines:  %8d\n"
                "words:  %8d\n"
                "chars:  %8d\n",
                lines, words, chars);
         totchars += chars;
         totwords += words;
         totlines += lines;
         chars = ;
         words = ;
         lines = ;
     }
     if (argc > )
     {
         printf("totlines:   %8d\n"
                "totwords:   %8d\n"
                "totchars:   %8d\n",
                totlines, totwords, totchars);
     }
     return ;
 }