Question about using redirection operators and the pipe operator?
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中国DOS联盟论坛 » DOS疑难解答 & 问题讨论 （解答室） » Question about using redirection operators and the pipe operator? [Help][Original]
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Posted 2004-02-02 00:00 · 中国 广东 广州 海珠区 电信
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Posted 2004-02-21 00:00 · 中国 湖北 武汉 电信
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Redirection means changing the system's default input/output target to one defined by the user.
For example:
TYPE A.TXT
will display the contents of A.TXT on the screen.
With redirection:
TYPE A.TXT>B.TXT
then the contents of A.TXT will be sent into B.TXT instead of the screen.
For example:
TYPE A.TXT
will display the contents of A.TXT on the screen.
With redirection:
TYPE A.TXT>B.TXT
then the contents of A.TXT will be sent into B.TXT instead of the screen.
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Posted 2004-02-24 00:00 · 中国 上海 鹏博士宽带
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Actually, what our friend is talking about is input/output redirection.
Redirection generally uses > and >>. The former will overwrite existing contents, while the latter appends.
| this thing is the pipe.
Its function is to use the output of the program command on the left as the input of the program command on the right.
For example: dir | find ""
This is used to display each subdirectory in the current directory.
Redirection generally uses > and >>. The former will overwrite existing contents, while the latter appends.
| this thing is the pipe.
Its function is to use the output of the program command on the left as the input of the program command on the right.
For example: dir | find ""
This is used to display each subdirectory in the current directory.
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