#define _XOPEN_SOURCE 700
#include <assert.h>
#include <fnmatch.h>
#include <regex.h>
#include <stdio.h>

int
main (void)
{
  regex_t reg;
  const char *pattern = "[[:digit:]]";
  const char *s = "0";
  int cflags = REG_NOSUB;

  assert(regcomp(&reg, pattern, cflags) == 0);
  if (regexec(&reg, s, 0, NULL, 0) == REG_NOMATCH)
    {
      printf("regexec: %s did not match /%s/\n", s, pattern);
    }
  else
    {
      printf("regexec: %s matched /%s/\n", s, pattern);
    }
  regfree(&reg);

  if (fnmatch(pattern, s, 0) == FNM_NOMATCH)
    {
      printf("fnmatch: %s did not match /%s/\n", s, pattern);
    }
  else
    {
      printf("fnmatch: %s matched /%s/\n", s, pattern);
    }
}