判断两个时间是同一天

bool IsToday(time_t nLastTime, time_t nNowTime)

{

 time_t LastTime = nLastTime;

 struct tm localTime;

 localtime_r(&LastTime, &localTime);

 time_t NowTime = nNowTime;

 struct tm localNowTime;

 localtime_r(&NowTime, &localNowTime);

 if (localTime.tm_year == localNowTime.tm_year &&

   localTime.tm_mon == localNowTime.tm_mon &&

   localTime.tm_mday == localNowTime.tm_mday)

 {

  return true;

 }

 else

  return false;

}

扩展

bool CTimer::IsToday() const

 if (m_Time == 0)

 time_t NowTime = time(NULL);

    struct tm localNowTime;

    localtime_r(&NowTime, &localNowTime);

    localtime_r(&m_Time, &localTime);

bool CTimer::IsThisWeek() const

 localtime_r(&m_Time, &localTime);

 return (localTime.tm_year == localNowTime.tm_year &&

 (localTime.tm_yday - localNowTime.tm_yday) == (GetWeek7Day(m_Time) - GetWeek7Day(NowTime)));

int CTimer::GetWeek7Day(time_t tTime) const

 localtime_r(&tTime, &localNowTime);

 return localNowTime.tm_wday == 0 ? 7 : localNowTime.tm_wday;

bool CTimer::IsThisMonth() const

   localTime.tm_mon == localNowTime.tm_mon);

bool CTimer::IsYesterday() const

    time_t NowTime = time(NULL);

    struct tm local;

    localtime_r(&NowTime, &local);

    struct tm LoaclTime;

    localtime_r(&m_Time, &LoaclTime);

    if (LoaclTime.tm_year != local.tm_year)

        return false;

    return (local.tm_yday - LoaclTime.tm_yday) == 1;

time_t CTimer::GetSunday() const

 struct tm local;

 localtime_r(&NowTime, &local);

 local.tm_mday = local.tm_mday - local.tm_wday + 1; //加1表示星期一的零时

 local.tm_hour = 0;

 local.tm_min = 0;

 local.tm_sec = 0;

 time_t Sunday = mktime(&local);

 return Sunday;

int CTimer::GetYear() const

 localtime_r(&m_Time, &localNowTime);

 return localNowTime.tm_year + 1900;

int CTimer::GetMonth() const

 return localNowTime.tm_mon + 1;

int CTimer::GetDay() const

 return localNowTime.tm_mday;

int CTimer::GetHour() const

 return localNowTime.tm_hour;

int CTimer::GetMinute() const

    localtime_r(&m_Time, &localNowTime);

 return localNowTime.tm_min;

int CTimer::GetSecond() const

 return localNowTime.tm_sec;

int CTimer::GetYearDay() const

    return localNowTime.tm_yday;

int CTimer::Get12Clock() const

 localNowTime.tm_mday = localNowTime.tm_mday + 1;

 localNowTime.tm_hour = 0;

 localNowTime.tm_min = 0;

 localNowTime.tm_sec = 0;

 time_t tToNight = mktime(&localNowTime);

 return tToNight - m_Time;

time_t CTimer::GetDate() const

  struct tm localNowTime;

  localtime_r(&m_Time, &localNowTime);

 time_t date = mktime(&localNowTime);

 return date;

int CTimer::GetWeekDay() const

 return localNowTime.tm_wday;