#keywords ATL,C++,COleDateTime,SYSTEMTIME,struct tm

[[TableOfContents]]

== 현재 시간 ==
{{{#!gcode

	COleDateTime tm = COleDateTime::GetCurrentTime();
	CString curDate = tm.Format("%Y%m%d");
}}}
----
{{{
%Y%m%d
20130809

%Y-%m-%d %H:%M:%S
2013-08-09 15:46:44
}}}

=== CTime::Format Types ===
{{{
%a Abbreviated weekday name
%A Full weekday name
%b Abbreviated month name
%B Full month name
%c Date and time representation appropriate for locale
%d Day of month as decimal number (01~31)
%H Hour in 24-hour format (00~23)
%I Hour in 12-hour format (01~12)
%j Day of year as decimal number (001~366)
%m Month as decimal number (01~12)
%M Minute as decimal number (00~59)
%p Current locale's A.M./P.M. indicator for 12-hour clock
%S Second as decimal number (00~59)
%U Week of year as decimal number, with Sunday as first day of week (00~53)
%w Weekday as decimal number (0~6; Sunday is 0)
%W Week of year as decimal number, with Monday as first day of week (00~53)
%x Date representation for current locale
%X Time representation for current locale
%y Year without century, as decimal number (00~99)
%Y Year with century, as decimal number
%z, %Z Either the time-zone name or time zone abbreviation, depending on registry settings; no characters if time zone is unknown
%% Percent sign
}}}

== 두 COleDateTime 객체 간의 시간 차이 ==
{{{#!gcode
	COleDateTime tm1;
	COleDateTime tm2;
	tm1.ParseDateTime(_T("2012-01-01 12:00:01"));
	tm2.ParseDateTime(_T("2013-02-02 12:10:30"));

	COleDateTimeSpan ts = tm2 - tm1;

	CString str;
	str.Format(_T("%d일 %d시간 %d분 %d초, %g시간"),
		ts.GetDays(), ts.GetHours(), ts.GetMinutes(), ts.GetSeconds(), ts.GetTotalHours());
	AfxMessageBox(str);
}}}
----
{{{
398일 0시간 10분 29초, 9552시간
}}}


{{{#!gcode
	CString str1("2012-11-20 14:40:57");
	CString str2("2012-11-20 14:40:59");

	COleDateTime tm1;
	COleDateTime tm2;
	tm1.ParseDateTime(str1);
	tm2.ParseDateTime(str2);

	COleDateTimeSpan ts = tm2 - tm1;

	D0(_T("%f"), ts.GetTotalSeconds());
}}}
----
{{{
2.000000
}}}

== 시간 늘리기 ==
COleDateTimeSpan( long lDays, int nHours, int nMins, int nSecs );
{{{#!gcode
COleDateTime tm = COleDateTime::GetCurrentTime();
COleDateTimeSpan AddMin(0, 0, 5, 0);
 
tm += AddMin;
}}}
----
{{{
}}}

== Convert ==
=== SYSTEMTIME to struct tm ===
{{{#!gcode
COleDateTime dt = COleDateTime::GetCurrentTime();

	SYSTEMTIME st;
	dt.GetAsSystemTime(st);
	struct tm *tm_date = new tm;

	tm_date->tm_hour = st.wHour;
	tm_date->tm_min = st.wMinute;
	tm_date->tm_mday = st.wDay;
	tm_date->tm_mon = st.wMonth;
	tm_date->tm_sec = st.wSecond;
	tm_date->tm_year = st.wYear - 1900;

	time_t time = mktime(tm_date);
}}}
==== SYSTEMTIME to struct tm 참고 ====
{{{#!gcode
typedef struct _SYSTEMTIME {
WORD wYear;
WORD wMonth;
WORD wDayOfWeek;
WORD wDay;
WORD wHour;
WORD wMinute;
WORD wSecond;
WORD wMilliseconds;
} SYSTEMTIME;

TM Data structure
{
tm_sec //Seconds after minute (0 – 59)
tm_min//Minutes after hour (0 – 59)
tm_hour//Hours since midnight (0 – 23)
tm_mday //Day of month (1 – 31)
tm_mon//Month (0 – 11; January = 0)
tm_year//Year (current year minus 1900)
tm_wday//Day of week (0 – 6; Sunday = 0)
tm_yday//Day of year (0 – 365; January 1 = 0)
tm_isdst//Always 0 for gmtime
}
}}}