blocks|key|1468934|text|您可以使用OutputDebugString。OutputDebugString是一个宏，根据您的构建选项，它可以映射到OutputDebugStringA(char+const*)或OutputDebugStringW(wchar_t+const*)。在后一种情况下，您必须为函数提供一个宽字符串。要创建宽字符文字，可以使用L前缀：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1468935|OutputDebugStringW(L"My+output+string.");|code-block|syntax|javascript|1468936|通常，您将宏版本与_T宏一起使用，如下所示：|1468937|OutputDebugString(_T("My+output+string."));|1468938|如果您的项目配置为使用UNICODE构建，它将扩展为：|1468939|OutputDebugStringW(L"My+output+string.");|1468940|如果不是为UNICODE构建，它将扩展为：|1468941|OutputDebugStringA("My+output+string.");|1468942|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/aa363362(VS.85).aspx)^0|5|H|N|H|1O|V|2K|Y|4J|1|5|H|0|0|0|9|2|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|14|8|@$9|15|A|16|B|C]|$9|17|A|18|B|C]|$9|19|A|1A|B|C]|$9|1B|A|1C|B|C]|$9|1D|A|1E|B|C]]|D|@$9|1F|A|1G|1|1H]]|E|$]]|$1|F|3|G|5|H|7|1I|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1J|8|@$9|1K|A|1L|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|1M|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|1N|8|@]|D|@]|E|$]]|$1|Q|3|R|5|H|7|1O|8|@]|D|@]|E|$I|J]]|$1|S|3|T|5|6|7|1P|8|@]|D|@]|E|$]]|$1|U|3|V|5|H|7|1Q|8|@]|D|@]|E|$I|J]]|$1|W|3|-4|5|6|7|1R|8|@]|D|@]|E|$]]]|X|$Y|$5|Z|10|11|E|$12|13]]]]

You can use <a href="http://msdn.microsoft.com/en-us/library/aa363362(VS.85).aspx" rel="noreferrer"><code>OutputDebugString</code></a>. <code>OutputDebugString</code> is a macro that depending on your build options either maps to <code>OutputDebugStringA(char const*)</code> or <code>OutputDebugStringW(wchar_t const*)</code>. In the later case you will have to supply a wide character string to the function. To create a wide character literal you can use the <code>L</code> prefix:

<pre><code>OutputDebugStringW(L"My output string.");
</code></pre>

Normally you will use the macro version together with the <code>_T</code> macro like this:

<pre><code>OutputDebugString(_T("My output string."));
</code></pre>

If you project is configured to build for UNICODE it will expand into:

<pre><code>OutputDebugStringW(L"My output string.");
</code></pre>

If you are not building for UNICODE it will expand into:

<pre><code>OutputDebugStringA("My output string.");
</code></pre>

blocks|key|1254284|text|要打印到real控制台，需要使用链接器标志/SUBSYSTEM:CONSOLE使其可见。额外的控制台窗口很烦人，但出于调试目的，它是非常有价值的。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1254285|当在调试器中运行时，OutputDebugString将打印到调试器输出。|1254286|entityMap^0|4|4|L|I|0|A|H|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|R|8|@]|D|@]|E|$]]]|I|$]]

To print to the <code>real</code> console, you need to make it visible by using the linker flag <code>/SUBSYSTEM:CONSOLE</code>. The extra console window is annoying, but for debugging purposes it's very valuable.

<code>OutputDebugString</code> prints to the debugger output when running inside the debugger.

blocks|key|1469039|text|如果要打印十进制变量：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1469040|wchar_t+text_buffer[20]+=+{+0+};+//temporary+buffer
swprintf(text_buffer,+_countof(text_buffer),+L"%25d",+your.variable);+//+convert
OutputDebugString(text_buffer);+//+print|code-block|syntax|javascript|1469041|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|$]]

If you want to print decimal variables:

<pre><code>wchar_t text_buffer[20] = { 0 }; //temporary buffer
swprintf(text_buffer, _countof(text_buffer), L"%d", your.variable); // convert
OutputDebugString(text_buffer); // print
</code></pre>

blocks|key|1254428|text|如果您需要查看广泛使用printf的现有程序的输出，但不更改代码(或进行最小的更改)，则可以按如下方式重新定义printf，并将其添加到公共头文件(stdafx.h)中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1254429|int+print_log(const+char*+format,+...)
{
++++static+char+s_printf_buf[1024];
++++va_list+args;
++++va_start(args,+format);
++++_vsnprintf(s_printf_buf,+sizeof(s_printf_buf),+format,+args);
++++va_end(args);
++++OutputDebugStringA(s_printf_buf);
++++return+0;
}

#define+printf(format,+...)+\
++++++++print_log(format,+__VA_ARGS__)|code-block|syntax|javascript|1254430|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|$]]

If you need to see the output of an existing program that extensively used printf w/o changing the code (or with minimal changes) you can redefine printf as follows and add it to the common header (stdafx.h). 

<pre><code>int print_log(const char* format, ...)
{
 static char s_printf_buf[1024];
 va_list args;
 va_start(args, format);
 _vsnprintf(s_printf_buf, sizeof(s_printf_buf), format, args);
 va_end(args);
 OutputDebugStringA(s_printf_buf);
 return 0;
}

#define printf(format, ...) \
 print_log(format, __VA_ARGS__)
</code></pre>

blocks|key|1469015|text|您的Win32项目很可能是图形用户界面项目，而不是控制台项目。这会导致可执行文件头的不同。因此，您的GUI项目将负责打开自己的窗口。不过，这可能是一个控制台窗口。调用AllocConsole()创建它，并使用Win32控制台函数对其进行写入。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1469016|entityMap^0|2B|E|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Your Win32 project is likely a GUI project, not a console project. This causes a difference in the executable header. As a result, your GUI project will be responsible for opening its own window. That may be a console window, though. Call <code>AllocConsole()</code> to create it, and use the Win32 console functions to write to it.

blocks|key|1469189|text|我正在寻找一种自己做这件事的方法，并想出了一个简单的解决方案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1469190|我假设您在Visual+Studio中启动了一个默认的Win32项目(Windows应用程序)，它提供了一个"WinMain“函数。默认情况下，Visual+Studio将入口点设置为"SUBSYSTEM:WINDOWS“。您需要首先通过转到以下位置来更改此设置：|1469191|Project+->属性->链接器->+System+->子系统|1469192|从下拉列表中选择[控制台(/SUBSYSTEM:CONSOLE)]。|1469193|现在，程序将不会运行，因为需要一个"main“函数而不是"WinMain”函数。|1469194|所以现在你可以像在C%2B%2B中一样添加一个"main“函数。之后，要启动图形用户界面程序，您可以从"WinMain“函数内部调用"main”函数。|1469195|程序的开始部分现在应该如下所示：|1469196|#include+<iostream>

using+namespace+std;

//+Main+function+for+the+console
int+main(){

++++//+Calling+the+wWinMain+function+to+start+the+GUI+program
++++//+Parameters:
++++//+GetModuleHandle(NULL)+-+To+get+a+handle+to+the+current+instance
++++//+NULL+-+Previous+instance+is+not+needed
++++//+NULL+-+Command+line+parameters+are+not+needed
++++//+1+-+To+show+the+window+normally
++++wWinMain(GetModuleHandle(NULL),+NULL,NULL,+1);+

++++system("pause");
++++return+0;
}

//+Function+for+entry+into+GUI+program
int+APIENTRY+wWinMain(_In_+HINSTANCE+hInstance,
+++++++++++++++++++++_In_opt_+HINSTANCE+hPrevInstance,
+++++++++++++++++++++_In_+LPWSTR++++lpCmdLine,
+++++++++++++++++++++_In_+int+++++++nCmdShow)
{
++++//+This+will+display+"Hello+World"+in+the+console+as+soon+as+the+GUI+begins.
++++cout+<<+"Hello+World"+<<+endl;
.
.
.|code-block|syntax|javascript|1469197|Result+of+my+implementation|offset|length|1469198|现在，您可以在GUI程序的任何部分使用函数输出到控制台进行调试或其他用途。|1469199|entityMap|0|LINK|mutability|MUTABLE|url|http://i.stack.imgur.com/yvxcq.png^0|0|0|0|0|0|0|0|0|0|R|0|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|17|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|18|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|19|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|1A|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1B|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|1C|8|@]|9|@]|A|$]]|$1|N|3|O|5|P|7|1D|8|@]|9|@]|A|$Q|R]]|$1|S|3|T|5|6|7|1E|8|@]|9|@$U|1F|V|1G|1|1H]]|A|$]]|$1|W|3|X|5|6|7|1I|8|@]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|1J|8|@]|9|@]|A|$]]]|Z|$10|$5|11|12|13|A|$14|15]]]]

I was looking for a way to do this myself and figured out a simple solution. 

I'm assuming that you started a default Win32 Project (Windows application) in Visual Studio, which provides a "WinMain" function. By default, Visual Studio sets the entry point to "SUBSYSTEM:WINDOWS". You need to first change this by going to:

Project -> Properties -> Linker -> System -> Subsystem

And select "Console (/SUBSYSTEM:CONSOLE)" from the drop-down list.

Now, the program will not run, since a "main" function is needed instead of the "WinMain" function.

So now you can add a "main" function like you normally would in C++. After this, to start the GUI program, you can call the "WinMain" function from inside the "main" function.

The starting part of your program should now look something like this:

<pre><code>#include &lt;iostream&gt;

using namespace std;

// Main function for the console
int main(){

 // Calling the wWinMain function to start the GUI program
 // Parameters:
 // GetModuleHandle(NULL) - To get a handle to the current instance
 // NULL - Previous instance is not needed
 // NULL - Command line parameters are not needed
 // 1 - To show the window normally
 wWinMain(GetModuleHandle(NULL), NULL,NULL, 1); 

 system("pause");
 return 0;
}

// Function for entry into GUI program
int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
 _In_opt_ HINSTANCE hPrevInstance,
 _In_ LPWSTR lpCmdLine,
 _In_ int nCmdShow)
{
 // This will display "Hello World" in the console as soon as the GUI begins.
 cout &lt;&lt; "Hello World" &lt;&lt; endl;
.
.
.
</code></pre>

<a href="http://i.stack.imgur.com/yvxcq.png" rel="nofollow">Result of my implementation</a>

Now you can use functions to output to the console in any part of your GUI program for debugging or other purposes.

blocks|key|1254577|text|这适用于MSVC下的C%2B%2B，甚至是通过调试器运行的图形用户界面应用程序。它在发布版本中也被完全省略了。它甚至使用C%2B%2B+stringstream进行灵活的输入。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1254578|#include+<iostream>

#ifdef+_MSC_VER
#include+"Windows.h"
#endif

#if+!defined(NDEBUG)+&&+defined(_MSC_VER)
#define+LOG(args)+{std::stringstream+_ss;+_ss+<<+__FILE__+<<+"@"+<<+__LINE__+<<+":+"+\
++++<<+args+<<+std::endl;+OutputDebugString(_ss.str().c_str());}
#else
#define+LOG(args)
#endif|code-block|syntax|javascript|1254579|像这样使用：|1254580|LOG("some+message+"+<<+someValue);|1254581|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

This works for C++ under MSVC, and even for GUI applications when being run via Debugger. It also gets omitted entirely from release builds. It even uses a C++ stringstream for flexible input.
<pre><code>#include &lt;iostream&gt;

#ifdef _MSC_VER
#include &quot;Windows.h&quot;
#endif

#if !defined(NDEBUG) &amp;&amp; defined(_MSC_VER)
#define LOG(args) {std::stringstream _ss; _ss &lt;&lt; __FILE__ &lt;&lt; &quot;@&quot; &lt;&lt; __LINE__ &lt;&lt; &quot;: &quot; \
 &lt;&lt; args &lt;&lt; std::endl; OutputDebugString(_ss.str().c_str());}
#else
#define LOG(args)
#endif
</code></pre>
Use like:
<pre><code>LOG(&quot;some message &quot; &lt;&lt; someValue);
</code></pre>

I've got a win32 project that I've loaded into Visual Studio 2005. I'd like to be able to print things to the Visual Studio output window, but I can't for the life of me work out how. I've tried 'printf' and 'cout &lt;&lt;' but my messages stay stubbornly unprinted.

Is there some sort of special way to print to the Visual Studio output window?

How do I print to the debug output window in a Win32 app?

Visual Studio

调试器

Windows

我有一个已经加载到Visual Studio2005中的win32项目。我希望能够将内容打印到Visual Studio的输出窗口中，但我终生不能解决如何打印的问题。我尝试过'printf‘和'cout <<’，但我的消息仍然顽固地不打印。是否有某种特殊的方法可以打印到Visual Studio输出窗口？

问如何打印到Win32应用程序中的调试输出窗口？
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回答 7

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问如何打印到Win32应用程序中的调试输出窗口？EN

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