regex.c

rc = pcre_exec(
      re,                   /* the compiled pattern */
      NULL,                 /* no extra data - we didn't study the pattern */
      subject,              /* the subject string */
      strlen(subject),       /* the length of the subject */
      0,                    /* start at offset 0 in the subject */
      0,                    /* default options */
      ovector,              /* output vector for substring information */
      OVECCOUNT);           /* number of elements in the output vector */

    if (rc < 0)
    {
        switch(rc)
        {
            case PCRE_ERROR_NOMATCH: printf("No match\n"); break;
            /*
            Handle other special cases if you like
            */
            default: printf("Matching error %d\n", rc); break;
        }
        pcre_free(re);     /* Release memory used for the compiled pattern */
        return 1;
    }

    /* Match succeded */

    printf("\nMatch succeeded at offset %d\n", ovector[0]);