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中国DOS联盟论坛 » DOS学习入门 & 精彩文章（教学室） » A newbie question View 616　Replies 2

Original Poster Posted 2003-08-05 00:00　·　中国浙江杭州余杭区电信

hotdog

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copy edit.com %RAMD%:\ > NUL
What is the purpose of adding >NUL?
rem copy extract.exe %RAMD%:\ > NUL
This line is a comment
Can it be removed?

Floor 2 Posted 2003-08-05 00:00　·　中国广东广州白云区电信

电吉入侵

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>nul redirects to the null device, so when it runs the screen won't display the command execution process.

rem is a comment and can be removed

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Floor 3 Posted 2003-08-05 00:00　·　中国浙江杭州余杭区电信

hotdog

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Got it, got it

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