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 = 0;
int words = 0;
int lines = 0;                                                                                                             

int  totchars = 0;
int  totwords = 0;
int  totlines = 0;
%}

%%
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 ♥   */

 {
    {
        chars++; lines++;   
    }
    }

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

%%

int main(int argc, char **argv)
{
    int i;
    if (argc < 2)
    {
        yylex();
        printf("lines:  %8d
"
               "words:  %8d
"
               "chars:  %8d
",
               lines, words, chars);
        return 0;
    }

    for (i = 1; i < argc; i++)
    {
        FILE *f = fopen(argv[i], "r");                                                                                     

        if (!f)
        {
            perror(argv[i]);
            return 1;
        }
        yyrestart(f);
        yylex();
        fclose(f);
        printf("lines:  %8d
"
               "words:  %8d
"
               "chars:  %8d
",
               lines, words, chars);
        totchars += chars;
        totwords += words;
        totlines += lines;
        chars = 0;
        words = 0;
        lines = 0;
    }
    if (argc > 1)
    {
        printf("totlines:   %8d
"
               "totwords:   %8d
"
               "totchars:   %8d
",
               totlines, totwords, totchars);
    }
    return 0;
}