blocks|key|2008104|text|尝试执行system("ping+host+>+nul")+(nul是windows版的UNIX+/dev/null)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2008105|entityMap^0|4|P|V|3|1D|9|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|O|8|@]|D|@]|E|$]]]|G|$]]

Try doing <code>system("ping host &gt; nul")</code> (<code>nul</code> is windows equivalent of UNIX <code>/dev/null</code>).

blocks|key|1258486|text|通常，如果您要调用另一个程序，但又不希望它的行为类似于std::system，那么您将需要一个特定于平台的函数，如UNIX上的fork()/exec()或Windows上的CreateProcess()。这些函数使您可以控制其他程序的运行方式，例如，不显示输出或不创建控制台窗口等。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1258487|entityMap|0|LINK|mutability|MUTABLE|url|http://pubs.opengroup.org/onlinepubs/007908799/xsh/fork.html|1|http://pubs.opengroup.org/onlinepubs/007908799/xsh/exec.html|2|http://msdn.microsoft.com/en-us/library/ms682425%2528VS.85%2529.aspx^0|R|B|1R|6|1Y|6|2E|F|1R|6|0|1Y|6|1|2E|F|2|0^^$0|@$1|2|3|4|5|6|7|R|8|@$9|S|A|T|B|C]|$9|U|A|V|B|C]|$9|W|A|X|B|C]|$9|Y|A|Z|B|C]]|D|@$9|10|A|11|1|12]|$9|13|A|14|1|15]|$9|16|A|17|1|18]]|E|$]]|$1|F|3|-4|5|6|7|19|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]|N|$5|I|J|K|E|$L|O]]|P|$5|I|J|K|E|$L|Q]]]]

Generally, if you're going to call another program but don't want it to act like <code>std::system</code>, you're going to need a platform-specific function like <a href="http://pubs.opengroup.org/onlinepubs/007908799/xsh/fork.html" rel="nofollow noreferrer"><code>fork()</code></a>/<a href="http://pubs.opengroup.org/onlinepubs/007908799/xsh/exec.html" rel="nofollow noreferrer"><code>exec()</code></a> on UNIX or <a href="http://msdn.microsoft.com/en-us/library/ms682425%28VS.85%29.aspx" rel="nofollow noreferrer"><code>CreateProcess()</code></a> on Windows. These functions give you control over how the other program runs, for instance, that it not show output or not create a console window, etc.

blocks|key|1258454|text|您可以像下面这样使用系统命令来抑制ping命令的输出。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1258455|system("ping+100.100.100.100+>+response.dat");|code-block|syntax|javascript|1258456|上面的命令pings地址100.100.100.100，并将输出定向到名为response.dat的文件。在response.dat中，您可以看到ping命令的响应。|1258457|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

You can use system command like below to suppress the output of ping command.

<pre><code>system("ping 100.100.100.100 &gt; response.dat");
</code></pre>

Above command pings IP address 100.100.100.100 and directs the output to a file called response.dat. In response.dat you can see the response of ping command.

blocks|key|3483240|text|执行system(+"ping+site.com+>nul+2>nul“)；并检查shell返回的值。如果ping成功，shell将返回0，否则将返回1。我会更详细，但Vis+Studio正在重新安装自己。:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3483241|还有一种方法可以使用Win+API来执行命令来隐藏控制台窗口，但是...我不记得细节了。|3483242|编辑:我还在等待MSVS的安装过程，所以...:)将CreateProcess与dwCreationFlags参数的DETACHED_PROCESS标志一起使用可隐藏控制台窗口。|3483243|在调用create+process之后，您必须在进程句柄上使用WaitForSingleObject来等待ping完成。CreateProcess的最后一个参数应该有一个指向包含进程句柄的进程信息的指针。(假设CreateProcess成功)您必须等待命令完成。一旦它完成，您就可以使用进程句柄来获取返回值，尽管我在这一点上没有时间告诉您如何做到这一点。|3483244|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

Do system( "ping site.com >nul 2>nul" ); and check the value the shell returns.
if the ping succeeds, the shell will return 0, else it will return 1.
I would be more detailed, but Vis Studio is reinstalling itself. :)

There's also a way to hide the console window using the Win API to exec the command, but...
I do not remember the details.

Edit:
I'm still waiting for the MSVS install process, so... :)
Use CreateProcess with the DETACHED_PROCESS flag for the dwCreationFlags parameter to hide the console window.

After you call create process, you'll have to use WaitForSingleObject on the process handle to wait for the ping to complete. The last parameter to CreateProcess should have a pointer to process information that contains the process handle. (Assuming CreateProcess was successful) You have to wait for the command to complete. Once it's complete, you can use the process handle to get the return value, though I'm too time contstrained to tell you how to do that at this point.

blocks|key|3483321|text|当您切换到Windows并调用CreateProcess()时，请确保设置：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3483322|++++lpStartupInfo->wShowWindow+=+SW_HIDE;|code-block|syntax|javascript|3483323|这将确保隐藏由新进程创建的任何窗口。|3483324|使用DETACHED_PROCESS标志将阻止新进程继承应用程序的控制台，但这不会阻止新进程创建新控制台。不确定ping会做什么，但最好使用SW_HIDE来消除所有疑虑。|3483325|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/ms682425%2528VS.85%2529.aspx^0|F|F|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|C|$]]|$1|K|3|L|5|6|7|10|8|@]|9|@]|C|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

When you get over to Windows and call <a href="http://msdn.microsoft.com/en-us/library/ms682425%28VS.85%29.aspx" rel="nofollow">CreateProcess()</a>, be sure to set:

<pre><code> lpStartupInfo-&gt;wShowWindow = SW_HIDE;
</code></pre>

This will ensure that any windows created by the new process are hidden.

Using the DETACHED_PROCESS flag will prevent the new process from inheriting your application's console, but that does not prevent the new process from creating a new console. Not sure what ping would do, but best to remove all doubt by using SW_HIDE.

blocks|key|4894742|text|你也可以使用这种方式，这将在一个文件中返回输出，而不会显示控制台窗口，并冻结主应用程序，这是非常有用的。首先，您需要使用；|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4894743|#include+<Windows.h>|code-block|syntax|javascript|4894744|然后发送ping命令并将输出写入一个文件，如下所示；|4894745|WinExec("ping+google.com+>+file.dat",+SW_HIDE);+|4894746|这将向google.com发送一个ping命令，并将输出写入当前正在运行的程序目录中的'file.dat‘文件。因此，您可以将file.dat更改为所需的任何文件或文件路径，当然，您也可以更改ping命令。>字符表示命令的输出需要写在它后面的文件路径中。如果您想在运行ping命令时显示控制台窗口并冻结应用程序，则需要使用以下代码行而不是WindExec()代码；|4894747|system("ping+google.com+>+file.dat");|4894748|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

You could also use this way, this will return the output in a file and doesn't show up a console windows and freezes the main application which is really usefull.
At first you need to include the Windows header using;

<pre><code>#include &lt;Windows.h&gt;
</code></pre>

then send a ping command and write the output into a file like this;

<pre><code>WinExec("ping google.com &gt; file.dat", SW_HIDE); 
</code></pre>

This will send a ping command to google.com and writes the output to the file 'file.dat' in the directory of your current running program. So you could change file.dat to any file or filepath you want and of course you could change the ping command. The > character means that the output of the command needs to be wrote in the file path behind it.
If you want to show the console window and freeze the application while running the ping command you need to use the following line of code instead of the WindExec() code;

<pre><code>system("ping google.com &gt; file.dat");
</code></pre>

I have written a simple program that pings three sites and then reacts to whether they are reachable or not.

My question is: can I suppress system("ping ")'s output? I have written my code in C++ as I know that language the best. Currently the code opens the ping.exe running the system command. If I can prevent the output from showing up while it still pings that would be ideal.

I am eventually going to turn this program in a windows service that is why I would like to suppress both the command line console window as well as suppress the ping output. Thanks.

Suppress system("ping") output in C++

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我已经写了一个简单的程序，它能ping通三个站点，然后对它们是否可达做出反应。我的问题是:我可以禁止系统(“ping”)的输出吗?我已经用C++写了我的代码，因为我最了解这种语言。目前，代码打开运行系统命令的ping.exe。如果我能阻止输出显示，而它仍然是ping，那将是最理想的。我最终将在windows服务中运行此程序，这就是为什么我既要抑制命令行控制台窗口，也要抑制ping输出。谢谢。

问在C++中禁止系统(“ping”)输出
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