Common operation and comparison of CTime COleDateTime

Common operation and comparison of CTime COleDateTime
1 to get the current time.
CTime time;
Time = Ctime::getcurrenttime ();
2) Gets the time element.
int year = time. GetYear ();
Int month = time. GetMonth ();
int day = time. Getday ();
int hour = time. Gethour ();
int minute = time. Getminute ();
int second = time. Getsecond ();
int DayOfWeek = time. GetDayOfWeek ();
3 Gets the time interval.
CTimeSpan TimeSpan (0,0,1,0); Days,hours,minutes,seconds
TimeSpan = Ctime::getcurrenttime ()-time;
4 Converts the time to a string.
CString sdate,stime,selapsed time;
Sdate = time. Format ("%m/%d/%y"); Ex:12/10/98
Stime = time. Format ("%h:%m:%s"); Ex:9:12:02
selapsed time = TimeSpan. Format ("%d:%h:%m:%s");
%d is total elapsed days
To find out more about the time format, see the strftime in the M F C document.
Using the COleDateTime class
1 Get one day of the year.
Coledate time datetime;
datetime = Coledatetime::getcurrenttime ();
int dayofyear = DateTime. Getdayofyear ();
2 reads the time from the text string.
Coledate time datetime;
Datetime. ParseDateTime ("12:12:23 January 93");
Description
CTime and COleDateTime have almost the same function. However, COleDateTime allows users to get a year
One of the day (a good way to create the Julian date), and parse a time text string.
Compared with CTime, COleDateTime's advantage is that it supports DWORD variables. COleDateTime use of
The number of digits is twice times that of a double floating-point, since CTime simply calculates the number of seconds elapsed since January 1, 1970.
Therefore to 2 0 3 7 years it would have reached 4 2 9 4 9 6 7 2 of 9 5, thereby no longer to be used. Instead
COleDateTime is a
Floating point number, which indicates that it is from 1 9 0 0 years 1 February 3 No. 0 Number of days after the day (hour is the number of days of the small parts), within thousands of years will not overflow. //------------------------------------------------------------------------------------------------------------- ---------------//

strcstring= "2003-10-27 6:24:37"; CString--->coledatetime
COleVariant vtime (strcstring);
Vtime. ChangeType (vt_date);
COleDateTime Time4=vtime;

COleDateTime time1 (1977,4,16,2,2,2); Coledatatime--->ctime
SYSTEMTIME Systime;
Varianttimetosystemtime (time1, &systime);
CTime TM (Systime);

time_t Time2=tm. GetTime (); CTime--->time_t
COleDateTime Time3 (time2); time_t--->coledatetime

CString str = Tdate.format (_t ("%y-%m-%d"));