blocks|key|188492|text|main的标准定义是|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|188493|int+main(int+argc,+char*+argv[])|code-block|syntax|javascript|188494|argv变量包含命令行参数。argc变量指示使用argv数组中的多少个条目。|188495|entityMap^0|0|4|0|0|0|4|E|4|O|4|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|N|$]]

The standard definition of <code>main</code> is

<pre><code>int main(int argc, char* argv[])
</code></pre>

The <code>argv</code> variable contains the command-line arguments. The <code>argc</code> variable indicates how many entries in the <code>argv</code> array are used.

blocks|key|406678|text|如果你在Windows上，你可以使用GetCommandLine来获取原始的命令行。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|406679|请注意，GetCommandLine还包括argv。因此，在将其传递给B之前，您必须从GetCommandLine的输出中超越argv。|406680|这是一些未进行错误检查的代码，用于执行此操作|406681|#include+<string.h>
#include+<windows.h>
#include+<iostream>
#include+<ctype.h>

int+main(int+argc,+char+**argv)
{
++++LPTSTR+cmd++=+GetCommandLine();

++++int+l+=+strlen(argv[0]);

++++if(cmd+==+strstr(cmd,+argv[0]))
++++{
++++++++cmd+=+cmd+%2B+l;
++++++++while(*cmd+&&+isspace(*cmd))
++++++++++++%2B%2Bcmd;
++++}

++++std::cout<<"Command+Line+is+:+"<<cmd;

}|code-block|syntax|javascript|406682|当我以A.exe+-a="a"+-b="b"身份运行上述程序时，会得到以下输出|style|CODE|406683|A.exe+-a="a"+-b="b"
Command+Line+is+:+-a="a"+-b="b"|406684|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/windows/desktop/ms683156%2528v=vs.85%2529.aspx^0|I|E|0|0|0|0|0|3|J|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@$A|11|B|12|1|13]]|C|$]]|$1|D|3|E|5|6|7|14|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|15|8|@]|9|@]|C|$]]|$1|H|3|I|5|J|7|16|8|@]|9|@]|C|$K|L]]|$1|M|3|N|5|6|7|17|8|@$A|18|B|19|O|P]]|9|@]|C|$]]|$1|Q|3|R|5|J|7|1A|8|@]|9|@]|C|$K|L]]|$1|S|3|-4|5|6|7|1B|8|@]|9|@]|C|$]]]|T|$U|$5|V|W|X|C|$Y|Z]]]]

If you are on Windows, you use <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/ms683156%28v=vs.85%29.aspx">GetCommandLine</a> to get the raw command line.

Note that GetCommandLine also includes argv[0]. So you will have to go beyond argv[0] from the output of GetCommandLine before passing it to B.

This is some non-error checked code to do that

<pre><code>#include &lt;string.h&gt;
#include &lt;windows.h&gt;
#include &lt;iostream&gt;
#include &lt;ctype.h&gt;

int main(int argc, char **argv)
{
 LPTSTR cmd = GetCommandLine();

 int l = strlen(argv[0]);

 if(cmd == strstr(cmd, argv[0]))
 {
 cmd = cmd + l;
 while(*cmd &amp;&amp; isspace(*cmd))
 ++cmd;
 }

 std::cout&lt;&lt;"Command Line is : "&lt;&lt;cmd;

}
</code></pre>

When I run the above program as <code>A.exe -a="a" -b="b"</code>, I get the following output

<pre><code>A.exe -a="a" -b="b"
Command Line is : -a="a" -b="b"
</code></pre>

blocks|key|406750|text|在程序开始运行之前，shell会将输入到shell中的原始字符串转换为argv。我从来没有听说过操作系统或shell除了argv之外还提供“原始”命令行。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|406751|如果用户使用引号将一个空格字符传递到您的参数中，该怎么办？如果他们使用反斜杠来转义引号中的引号呢？不同的shell甚至可能有不同的引用规则。|406752|如果你有一个像argv这样的列表，你应该尝试找到一个可以接受它的接口，而不是尝试实现字符串处理，这只是实际目标的辅助。微软非常重视安全性，他们当然提供了一些不需要在应用程序中增加安全漏洞的东西。|406753|我找不到任何有关C/C%2B%2B+API的文档；我假设这是BeginProcess，但无论如何，您都应该仔细检查您的平台的参考手册，以获得替代的系统调用。|406754|entityMap^0|Z|4|1O|4|0|0|7|4|0|Q|C|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|S|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|L|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|M|$]]

The raw string typed into the shell is converted by the shell into <code>argv</code> before your program begins running. I've never heard of an operating system or shell providing a "raw" command-line in addition to <code>argv</code>.

What if the user used quotes to pass a space character into your arguments? What if they used a backslash to escape a quote inside the quotes? Different shells may even have different quoting rules.

If you have a list like <code>argv</code>, you should try to find an API that accepts that rather than attempting to implement string processing which is only auxiliary to the actual goal. Microsoft is serious about security and they certainly provide something that doesn't require adding a security hole to your application.

I can't find documentation about any C/C++ API <code>BeginProcess</code>; I'm kind of assuming this is Windows but in any case you should double check your platform's reference manual for an alternative system call.

blocks|key|406804|text|这就是我将命令行转回shell+args的方法。有时，这很适合回显到输出文件中，以便将“使用了什么参数”与输出一起保存。转义是基本的，对于大多数情况来说已经足够了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|406805|我从命令(i=0)开始输出。如果只需要参数，则可以更改为(i=1)，等等。|406806|//you+have+to+free()+the+result!,+returns+null+if+no+args
char+*arg2cmd(int+argc,+char**+argv)+{
++++char+*buf=NULL;
++++int+n+=+0;
++++int+k,+i;
++++for+(i=0;+i+<argc;%2B%2Bi)+{
++++++++int+k=strlen(argv[i]);
++++++++buf=(+char+*)realloc(buf,n%2Bk%2B4);
++++++++char+*p=buf%2Bn;
++++++++char+endq=0;
++++++++//+this+is+a+poor+mans+quoting,+which+is+good+enough+for+anything+that's+not+rediculous
++++++++if+(strchr(argv[i],+'+'))+{
++++++++++++if+(!strchr(argv[i],+'\''))+{
++++++++++++++++*p%2B%2B='\'';
++++++++++++++++endq='\'';
++++++++++++}+else+{
++++++++++++++++*p%2B%2B='\"';
++++++++++++++++endq='\"';
++++++++++++}
++++++++}
++++++++memcpy(p,+argv[i],+k);
++++++++p%2B=k;
++++++++if+(i+<+(argc-1))+*p%2B%2B='+';
++++++++if+(endq)+*p%2B%2B=endq;
++++++++*p='\0';
++++++++n+=+p-buf;
++++}
++++return+buf;
}|code-block|syntax|javascript|406807|和一个简单的cpp包装器：|406808|std::string+arg2string(int+argc,+char+**argv)+{
++++char+*tmp=arg2cmd(argc,+argv);
++++std::string+ret=tmp;
++++free(tmp);
++++return+ret;
}|406809|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

This is how I turn the command line back into shell args. Sometime this is nice to echo into an output file, to save "what arguments were used" along with the output. The escaping is rudimentary, and sufficient for most situations.

I started the output at the command (i=0). You can change to (i=1) if you want arguments only, etc.

<pre><code>//you have to free() the result!, returns null if no args
char *arg2cmd(int argc, char** argv) {
 char *buf=NULL;
 int n = 0;
 int k, i;
 for (i=0; i &lt;argc;++i) {
 int k=strlen(argv[i]);
 buf=( char *)realloc(buf,n+k+4);
 char *p=buf+n;
 char endq=0;
 // this is a poor mans quoting, which is good enough for anything that's not rediculous
 if (strchr(argv[i], ' ')) {
 if (!strchr(argv[i], '\'')) {
 *p++='\'';
 endq='\'';
 } else {
 *p++='\"';
 endq='\"';
 }
 }
 memcpy(p, argv[i], k);
 p+=k;
 if (i &lt; (argc-1)) *p++=' ';
 if (endq) *p++=endq;
 *p='\0';
 n = p-buf;
 }
 return buf;
}
</code></pre>

And a simple cpp wrapper:

<pre><code>std::string arg2string(int argc, char **argv) {
 char *tmp=arg2cmd(argc, argv);
 std::string ret=tmp;
 free(tmp);
 return ret;
}
</code></pre>

blocks|key|188632|text|在C%2B%2B/CLI中是这样的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|188633|String%5E+cmdarg+=+Environment::CommandLine;|code-block|syntax|javascript|188634|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

In C++/CLI there's this:

<pre><code>String^ cmdarg = Environment::CommandLine;
</code></pre>

blocks|key|188664|text|如果你在Windows上，我相信正确的解决方案是调用GetCommandLine()获得完整的命令行，然后调用PathGetArgs(CommandLine)从头开始删除arg0+(可执行文件路径)。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|188665|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.microsoft.com/en-gb/windows/win32/api/shlwapi/nf-shlwapi-pathgetargsw^0|1J|O|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

If you're on Windows, I believe the correct solution is to call GetCommandLine() to get your full commandline, and then <a href="https://docs.microsoft.com/en-gb/windows/win32/api/shlwapi/nf-shlwapi-pathgetargsw" rel="nofollow noreferrer">PathGetArgs(CommandLine)</a> to remove arg0 (your exe path) from the beginning.

I need to pass command line arguments from A.exe to B.exe. If A.exe with multi-args like 

<code>A.exe -a="a" -b="b"'</code>

and I can use 

<code>BeginProcess("B.exe", **args!**)</code>

to start B.exe.
How can I get the raw command line arguments like 

<code>'-a="a" -b="b"'</code>

How to get the raw command line arguments

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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我需要从A.exe向B.exe传递命令行参数。如果使用多参数的A.exeA.exe -a="a" -b="b"'我可以使用BeginProcess("B.exe", **args!**)启动B.exe。如何获得原始的命令行参数，如'-a="a" -b="b"'

问如何获取原始命令行参数
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问如何获取原始命令行参数EN

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问如何获取原始命令行参数
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