Question

我只想弄明白，

批处理文件（CMD）如何告诉我从任何日期起离开多少天...... ???

如：

set setdate=24/07/2009
echo The date is now: %date%
echo Your set date is: %setdate%
echo You're %days% days left from %setdate%

谢谢！

Answer 1

...好吧，既然提问者要我为他做所有的工作，这就是剧本：

@echo off & setlocal
set now=%date%
set then=2010-08-01

:: split into year, month, day
set nY=%now:~0,4%&set nM=%now:~5,2%&set nD=%now:~8,2%
set tY=%then:~0,4%&set tM=%then:~5,2%&set tD=%then:~8,2%

:: remove leading zero
if "%nM:~,1%"=="0" set nM=%nM:~1%
if "%tM:~,1%"=="0" set tM=%tM:~1%
if "%nD:~,1%"=="0" set nD=%nD:~1%
if "%tD:~,1%"=="0" set tD=%tD:~1%

set mdays=31 28 31 30 31 30 31 31 30 31 30 31
set n=0
set t=0
call :days n %nM% %mdays%
call :days t %tM% %mdays%

set /a d=(t+tD)-(n+nD) + ((tY-nY) * 365)

goto :skip
:days
set var=%1
set M=%2
set i=0
shift & shift
:days_loop
set /a i=i+1    
if %i% geq %M% goto :EOF
set /a %var%=%var%+%1
shift & goto :days_loop
:skip

echo The difference between %now% and %then% is %d% days.

为了比较，在Python中也是如此：

import datetime
now = datetime.datetime.now()
then = datetime.datetime(
    # Do NOT use leading zeros here.
    year = 2010,
    month = 8,
    day = 1,
)
diff = then - now

Answer 2

可能可以通过cmd.exe中的简单数学功能来实现，但它取决于机器的区域设置（如果使用DD /的日期格式） MM / YYYY，它将在我的YYYY-MM-DD上打破），这需要很多代码。

为此可能更容易使用Perl，PHP或Python等脚本语言。

Answer 3

这是VBScript中的一个简单解决方案：

Dim dt:    dt    = DateValue(WScript.Arguments.Unnamed(0))
Dim dtNow: dtNow = Now
Dim diff:  diff  = DateDiff("d", dtNow, dt)

WScript.Echo "The date is now:  " & FormatDateTime(dtNow, vbShortDate)
WScript.Echo "Your set date is: " & FormatDateTime(dt, vbShortDate)
WScript.Echo "You're " & diff & " days left from " & FormatDateTime(dt, vbShortDate)

您可以从批处理文件中调用此脚本，并指定目标日期，如下所示：

cscript filename.vbs 12/25/2009 //nologo

CMD：剩下多少

3 个答案: