CTime或者COleDateTime，Format方法的使用

CTime ct = CTime::GetCurrentTime();

CString str = ct.Format("%Y-%m_%d %H-%M-%S");

输出为：str="2006-04-23 15-21-30"

%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

// Example for CTime::Format and CTime::FormatGmt
CTime t( 1999, 3, 19, 22, 15, 0 );
// 10:15 PM March 19, 1999
CString s = t.Format( "%A, %B %d, %Y" );
ATLASSERT( s == "Friday, March 19, 1999" );