vc下的时间格式化

formatting   codes   for   strftime   are   listed   below:    
  %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