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linux CÕýÔò±í´ïʽ

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[c]
#include <stdio.h>
#include <sys/types.h>
#include <regex.h>
/* È¡×Ó´®µÄº¯Êý */
static char* substr(const char*str,unsigned start, unsigned end)
{
      unsigned n = end - start;
      static char stbuf[256];
      strncpy(stbuf, str + start, n);
      stbuf[n] = 0;
      return stbuf;
}
/* Ö÷³ÌÐò */
int main(int argc, char** argv)
{
      char * pattern;
      int x, z, lno = 0, cflags = 0;
      char ebuf[128], lbuf[256];
      regex_t reg;
      regmatch_t pm[10];
      const size_t nmatch = 10;
/* ±àÒëÕýÔò±í´ïʽ*/
      pattern = argv[1]; //»ñÈ¡ÕýÔò±í´ïʽ
      z = regcomp(&reg, pattern, cflags); //Èç¹û±àÒë³É¹¦·µ»Ø0,ÆäËü·µ»ØËµÃ÷ÓдíÎó²úÉú
      if (z != 0)
      {
             regerror(z, &reg, ebuf, sizeof(ebuf));
             fprintf(stderr, "%s: pattern '%s' \n",ebuf, pattern);
             return 1;
      }
/* ÖðÐд¦ÀíÊäÈëµÄÊý¾Ý */
      while(fgets(lbuf, sizeof(lbuf), stdin))
      {
            ++lno;
//È¡µÃ¶ÁÈ¡×Ö·û´®µÄ³¤¶È£¬²¢ÅжÏ×Ö·û´®½áβ×Ö·ûÊÇ·ñΪ»Ø³µ·û'\n'¡£Èç¹ûÊÇ£¬½«½áβ×Ö·û¸ÄΪ0
            if ((z = strlen(lbuf)) > 0 && lbuf[z-1]== '\n')
                  lbuf[z - 1] = 0;
/* ¶ÔÿһÐÐÓ¦ÓÃÕýÔò±í´ïʽ½øÐÐÆ¥Åä */
           z = regexec(&reg, lbuf, nmatch, pm, 0);
           if (z == REG_NOMATCH) continue;
 &nbs


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