使用system（）附加到文件 [英] Appending to a File using system()
问题描述
我一直在使用system（）命令将
程序的结果写入文件。这可以通过以下方式实现：
运行netstat例如：
system（" netstat example.txt"）;
当我再次运行命令时，它会使用
新结果完全重写文本文件。我想要做的是再次运行命令并将
结果附加到文本文件而不是完全重写
文本文件。我已经尝试了几个混合命令使用< fstreambut
什么都没有用。感谢您的帮助。
I have been using the system() command to write the results of a
program to a file. This is being accomplished by the following when
running netstat for example:
system("netstat example.txt");
When I run the command again, it completely rewrites the text file with
new results. What I would like to do is run the command again and have
the results append to the text file instead of completely rewriting the
text file. I have tried several hybrid commands using <fstreambut
nothing has worked yet. Thanks for any help.
推荐答案
Reggie写道：
Reggie wrote:
I一直在使用system（）命令将
程序的结果写入文件。这可以通过以下方式实现：
运行netstat例如：
system（" netstat example.txt"）;
当我再次运行命令时，它会使用
新结果完全重写文本文件。我想要做的是再次运行命令并将
结果附加到文本文件而不是完全重写
文本文件。我已经尝试了几个混合命令使用< fstreambut
什么都没有用。谢谢你的帮助。
I have been using the system() command to write the results of a
program to a file. This is being accomplished by the following when
running netstat for example:
system("netstat example.txt");
When I run the command again, it completely rewrites the text file with
new results. What I would like to do is run the command again and have
the results append to the text file instead of completely rewriting the
text file. I have tried several hybrid commands using <fstreambut
nothing has worked yet. Thanks for any help.
这是一个操作系统依赖项，所以你应该在一个专门用于你的操作系统（或UNIX，你的shell）的组中询问。 < OT>在某些环境中，">>"
附加。< / OT>
干杯！ --M
This is an OS dependency, so you should ask in a group dedicated to
your OS (or in UNIX, your shell). <OT>In some environments, ">>"
appends.</OT>
Cheers! --M
Reggie写道：
Reggie wrote:
我一直在使用system（）命令将一个
程序的结果写入文件。这可以通过以下方式实现：
运行netstat例如：
system（" netstat example.txt"）;
当我再次运行命令时，它会使用
新结果完全重写文本文件。我想要做的是再次运行命令并将
结果附加到文本文件而不是完全重写
文本文件。我已经尝试了几个混合命令使用< fstreambut
什么都没有用。谢谢你的帮助。
I have been using the system() command to write the results of a
program to a file. This is being accomplished by the following when
running netstat for example:
system("netstat example.txt");
When I run the command again, it completely rewrites the text file with
new results. What I would like to do is run the command again and have
the results append to the text file instead of completely rewriting the
text file. I have tried several hybrid commands using <fstreambut
nothing has worked yet. Thanks for any help.
尝试
system（" netstat> example.txt"）;
谢谢和问候
SJ
Try
system("netstat >example.txt");
Thanks and regards
SJ
Reggie写道：
Reggie wrote:
system（netstat example.txt）;
当我再次运行命令时，它会用
新结果完全重写文本文件。我想要做的是再次运行命令并将
结果附加到文本文件
system("netstat example.txt");
When I run the command again, it completely rewrites the text file with
new results. What I would like to do is run the command again and have
the results append to the text file
system（" netstat> ; example.txt"）;
-
Phlip
http://c2.com/cgi/wiki?ZeekLand < - 不是博客!!!
system("netstat >example.txt");
--
Phlip
http://c2.com/cgi/wiki?ZeekLand <-- NOT a blog!!!
这篇关于使用system（）附加到文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
