时间转换（tm，mktime，localtime）

int year = 0;

    int month = 0;

    int day = 0;

    sscanf((char*)strDateInfo,"%4d%2d%2d",&year, &month, &day);

    struct tm paraTime = { 0, 0, 0, day, month - 1, year - 1900};

    __time32_t curDay =  _mktime32(&paraTime);

    __time32_t today;

    _time32(&today);

    struct tm* today_ptr = _localtime32(&today);

    struct tm schd_start;

    memcpy(&schd_start, today_ptr, sizeof(tm));

    schd_start.tm_hour = 0;

    schd_start.tm_min = 0;

    schd_start.tm_sec = 0;

    __time32_t stime = _mktime32(&schd_start);