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CODE: [Copy to clipboard]要求,日期必须在文件开头,如果不在开头自行修改。dir c:\a.txt | find " 0 字节"
goto %errorlevel%
:1
set /p ddd=<a.txt
set num1=%date:~0,4%%date:~5,2%%date:~8,2%
set num2=%ddd:~0,4%%ddd:~5,2%%ddd:~8,2%
set /a num = num1 - num2
if %num% == 1 echo 这里是要附加的内容 >>a.txt
goto :eof
:0
del a.txt
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