blocks|key|1285638|text|OutputDebugString函数可以做到这一点。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1285639|示例代码|1285640|++++void+CClass::Output(const+char*+szFormat,+...)
{
++++char+szBuff[1024];
++++va_list+arg;
++++va_start(arg,+szFormat);
++++_vsnprintf(szBuff,+sizeof(szBuff),+szFormat,+arg);
++++va_end(arg);

++++OutputDebugString(szBuff);
}|code-block|syntax|javascript|1285641|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/aa363362%2528VS.85%2529.aspx^0|0|H|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|X|8|@]|9|@]|C|$I|J]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

<a href="http://msdn.microsoft.com/en-us/library/aa363362%28VS.85%29.aspx" rel="noreferrer">OutputDebugString</a> function will do it.

example code

<pre><code> void CClass::Output(const char* szFormat, ...)
{
 char szBuff[1024];
 va_list arg;
 va_start(arg, szFormat);
 _vsnprintf(szBuff, sizeof(szBuff), szFormat, arg);
 va_end(arg);

 OutputDebugString(szBuff);
}
</code></pre>

blocks|key|1285670|text|如果这是为了调试输出，那么OutputDebugString就是您想要的。一个有用的宏：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1285671|#define+DBOUT(+s+)++++++++++++\
{+++++++++++++++++++++++++++++\
+++std::ostringstream+os_;++++\
+++os_+<<+s;+++++++++++++++++++\
+++OutputDebugString(+os_.str().c_str()+);++\
}|code-block|syntax|javascript|1285672|这样你就可以说出这样的话：|1285673|DBOUT(+"The+value+of+x+is+"+<<+x+);|1285674|您可以使用__LINE__和__FILE__宏对其进行扩展，以提供更多信息。|style|CODE|1285675|对于Windows和宽字符区域中的用户：|1285676|#include+<Windows.h>
#include+<iostream>
#include+<sstream>

+#define+DBOUT(+s+)++++++++++++\
{+++++++++++++++++++++++++++++\
+++std::wostringstream+os_;++++\
+++os_+<<+s;+++++++++++++++++++\
+++OutputDebugStringW(+os_.str().c_str()+);++\
}|1285677|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/aa363362%2528VS.85%2529.aspx^0|D|H|0|0|0|0|0|5|8|E|8|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|D|3|E|5|F|7|16|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|17|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|18|8|@]|9|@]|C|$G|H]]|$1|M|3|N|5|6|7|19|8|@$A|1A|B|1B|O|P]|$A|1C|B|1D|O|P]]|9|@]|C|$]]|$1|Q|3|R|5|6|7|1E|8|@]|9|@]|C|$]]|$1|S|3|T|5|F|7|1F|8|@]|9|@]|C|$G|H]]|$1|U|3|-4|5|6|7|1G|8|@]|9|@]|C|$]]]|V|$W|$5|X|Y|Z|C|$10|11]]]]

If this is for debug output then <a href="http://msdn.microsoft.com/en-us/library/aa363362%28VS.85%29.aspx" rel="noreferrer">OutputDebugString</a> is what you want. A useful macro :

<pre><code>#define DBOUT( s ) \
{ \
 std::ostringstream os_; \
 os_ &lt;&lt; s; \
 OutputDebugString( os_.str().c_str() ); \
}
</code></pre>

This allows you to say things like:

<pre><code>DBOUT( "The value of x is " &lt;&lt; x );
</code></pre>

You can extend this using the <code>__LINE__</code> and <code>__FILE__</code> macros to give even more information.

For those in Windows and wide character land:

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

 #define DBOUT( s ) \
{ \
 std::wostringstream os_; \
 os_ &lt;&lt; s; \
 OutputDebugStringW( os_.str().c_str() ); \
}
</code></pre>

blocks|key|1285702|text|使用OutputDebugString函数或允许您进行printf-style格式设置的MFC宏：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1285703|int+x+=+1;
int+y+=+16;
float+z+=+32.0;
TRACE(+"This+is+a+TRACE+statement\n"+);++++
TRACE(+"The+value+of+x+is+%25d\n",+x+);
TRACE(+"x+=+%25d+and+y+=+%25d\n",+x,+y+);
TRACE(+"x+=+%25d+and+y+=+%25x+and+z+=+%25f\n",+x,+y,+z+);|code-block|syntax|javascript|1285704|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/aa363362(VS.85).aspx^0|2|H|R|6|2|H|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@$9|X|A|Y|1|Z]]|E|$]]|$1|F|3|G|5|H|7|10|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

Use the <a href="http://msdn.microsoft.com/en-us/library/aa363362(VS.85).aspx" rel="noreferrer"><code>OutputDebugString</code></a> function or the <a href="http://msdn.microsoft.com/en-us/library/4wyz8787(VS.80).aspx" rel="noreferrer"><code>TRACE</code></a> macro (MFC) which lets you do <code>printf</code>-style formatting:

<pre><code>int x = 1;
int y = 16;
float z = 32.0;
TRACE( "This is a TRACE statement\n" ); 
TRACE( "The value of x is %d\n", x );
TRACE( "x = %d and y = %d\n", x, y );
TRACE( "x = %d and y = %x and z = %f\n", x, y, z );
</code></pre>

blocks|key|1285752|text|有用的提示-如果您使用__FILE__和__LINE__，那么请将您的调试文件格式化为：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1285753|"file(line):+Your+output+here"|code-block|syntax|javascript|1285754|然后，当您单击输出窗口中的该行时，Visual+Studio将直接跳转到该行代码。举个例子：|1285755|#include+<Windows.h>
#include+<iostream>
#include+<sstream>

void+DBOut(const+char+*file,+const+int+line,+const+WCHAR+*s)
{
++++std::wostringstream+os_;
++++os_+<<+file+<<+"("+<<+line+<<+"):+";
++++os_+<<+s;
++++OutputDebugStringW(os_.str().c_str());
}

#define+DBOUT(s)+++++++DBOut(__FILE__,+__LINE__,+s)|1285756|我写了一篇关于这个的博文，所以我总是知道我可以在哪里找到它：https://windowscecleaner.blogspot.co.nz/2013/04/debug-output-tricks-for-visual-studio.html|1285757|entityMap|0|LINK|mutability|MUTABLE|url|https://windowscecleaner.blogspot.co.nz/2013/04/debug-output-tricks-for-visual-studio.html^0|B|8|K|8|0|0|0|0|U|2I|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|14|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|15|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|16|8|@]|D|@$9|17|A|18|1|19]]|E|$]]|$1|Q|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]]]

Useful tip - if you use <code>__FILE__</code> and <code>__LINE__</code> then format your debug as:

<pre><code>"file(line): Your output here"
</code></pre>

then when you click on that line in the output window Visual Studio will jump directly to that line of code. An example:

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

void DBOut(const char *file, const int line, const WCHAR *s)
{
 std::wostringstream os_;
 os_ &lt;&lt; file &lt;&lt; "(" &lt;&lt; line &lt;&lt; "): ";
 os_ &lt;&lt; s;
 OutputDebugStringW(os_.str().c_str());
}

#define DBOUT(s) DBOut(__FILE__, __LINE__, s)
</code></pre>

I wrote a blog post about this so I always knew where I could look it up:
<a href="https://windowscecleaner.blogspot.co.nz/2013/04/debug-output-tricks-for-visual-studio.html" rel="nofollow noreferrer">https://windowscecleaner.blogspot.co.nz/2013/04/debug-output-tricks-for-visual-studio.html</a>

blocks|key|1285711|text|使用OutputDebugString而不是afxDump。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1285712|示例：|1285713|#define+_TRACE_MAXLEN+500

#if+_MSC_VER+>=+1900
#define+_PRINT_DEBUG_STRING(text)+OutputDebugString(text)
#else+//+_MSC_VER+>=+1900
#define+_PRINT_DEBUG_STRING(text)+afxDump+<<+text
#endif+//+_MSC_VER+>=+1900

void+MyTrace(LPCTSTR+sFormat,+...)
{
++++TCHAR+text[_TRACE_MAXLEN+%2B+1];
++++memset(text,+0,+_TRACE_MAXLEN+%2B+1);
++++va_list+args;
++++va_start(args,+sFormat);
++++int+n+=+_vsntprintf(text,+_TRACE_MAXLEN,+sFormat,+args);
++++va_end(args);
++++_PRINT_DEBUG_STRING(text);
++++if(n+<=+0)
++++++++_PRINT_DEBUG_STRING(_T("[...]"));
}|code-block|syntax|javascript|1285714|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Use OutputDebugString instead of afxDump.

Example:

<pre><code>#define _TRACE_MAXLEN 500

#if _MSC_VER &gt;= 1900
#define _PRINT_DEBUG_STRING(text) OutputDebugString(text)
#else // _MSC_VER &gt;= 1900
#define _PRINT_DEBUG_STRING(text) afxDump &lt;&lt; text
#endif // _MSC_VER &gt;= 1900

void MyTrace(LPCTSTR sFormat, ...)
{
 TCHAR text[_TRACE_MAXLEN + 1];
 memset(text, 0, _TRACE_MAXLEN + 1);
 va_list args;
 va_start(args, sFormat);
 int n = _vsntprintf(text, _TRACE_MAXLEN, sFormat, args);
 va_end(args);
 _PRINT_DEBUG_STRING(text);
 if(n &lt;= 0)
 _PRINT_DEBUG_STRING(_T("[...]"));
}
</code></pre>

blocks|key|1285774|text|#define+WIN32_LEAN_AND_MEAN
#include+<Windows.h>

wstring+outputMe+=+L"can"+%2B+L"+concatenate\n";
OutputDebugString(outputMe.c_str());|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1285775|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>#define WIN32_LEAN_AND_MEAN
#include &lt;Windows.h&gt;

wstring outputMe = L"can" + L" concatenate\n";
OutputDebugString(outputMe.c_str());
</code></pre>

Which function should I use to output text to the "Output" window in Visual Studio?

I tried <code>printf()</code> but it doesn't show up.

How to write to the Output window in Visual Studio?

Visual Studio

Windows

我应该使用哪个函数将文本输出到Visual Studio中的" output“窗口？我尝试过printf()，但没有显示出来。

问如何在Visual Studio中写入输出窗口？
EN

回答 6

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