[DOS] rename+日期格式

c:>echo %date%
2010-07-15 星期四

c:>echo %date:~0,4%
2010

c:>echo %date:~-3%
星期四

c:>echo %date:~5,5%%date:~8,2%
0715

c:>echo %date:~0,4%%date:~5,2%%date:~8,2%
20100715

c:> rename A.txt %date:~5,5%%date:~8,2%.txt
就會將A.TXT更名為 "系統日期 MMDD".TXT