blocks|key|1123802|text|如果可以打印到stderr，则可以使用以下最初用于调试的流：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1123803|#include<QDebug>

//qInfo+is+qt5.5%2B+only.
qInfo()+<<+"C%2B%2B+Style+Info+Message";
qInfo(+"C+Style+Info+Message"+);

qDebug()+<<+"C%2B%2B+Style+Debug+Message";
qDebug(+"C+Style+Debug+Message"+);

qWarning()+<<+"C%2B%2B+Style+Warning+Message";
qWarning(+"C+Style+Warning+Message"+);

qCritical()+<<+"C%2B%2B+Style+Critical+Error+Message";
qCritical(+"C+Style+Critical+Error+Message"+);

//+qFatal+does+not+have+a+C%2B%2B+style+method.
qFatal(+"C+Style+Fatal+Error+Message"+);|code-block|syntax|javascript|1123804|尽管如注释中所指出的，但请记住，如果定义了QT_NO_DEBUG_OUTPUT，则会删除qDebug消息|1123805|如果你需要stdout，你可以尝试这样做(正如Kyle+Strand所指出的)：|1123806|QTextStream&+qStdOut()
{
++++static+QTextStream+ts(+stdout+);
++++return+ts;
}|1123807|然后，您可以按如下方式调用：|1123808|qStdOut()+<<+"std+out!";|1123809|entityMap^0|7|6|0|0|L|I|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|M|3|N|5|6|7|13|8|@]|D|@]|E|$]]|$1|O|3|P|5|H|7|14|8|@]|D|@]|E|$I|J]]|$1|Q|3|R|5|6|7|15|8|@]|D|@]|E|$]]|$1|S|3|T|5|H|7|16|8|@]|D|@]|E|$I|J]]|$1|U|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|V|$]]

If it is good enough to print to <code>stderr</code>, you can use the following streams originally intended for debugging:

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

//qInfo is qt5.5+ only.
qInfo() &lt;&lt; "C++ Style Info Message";
qInfo( "C Style Info Message" );

qDebug() &lt;&lt; "C++ Style Debug Message";
qDebug( "C Style Debug Message" );

qWarning() &lt;&lt; "C++ Style Warning Message";
qWarning( "C Style Warning Message" );

qCritical() &lt;&lt; "C++ Style Critical Error Message";
qCritical( "C Style Critical Error Message" );

// qFatal does not have a C++ style method.
qFatal( "C Style Fatal Error Message" );
</code></pre>

Though as pointed out in the comments, bear in mind qDebug messages are removed if <code>QT_NO_DEBUG_OUTPUT</code> is defined

If you need stdout you could try something like this (as Kyle Strand has pointed out):

<pre><code>QTextStream&amp; qStdOut()
{
 static QTextStream ts( stdout );
 return ts;
}
</code></pre>

You could then call as follows:

<pre><code>qStdOut() &lt;&lt; "std out!";
</code></pre>

blocks|key|908980|text|我发现this最有用：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|908981|#include+<QTextStream>

QTextStream+out(stdout);
foreach(QString+x,+strings)
++++out+<<+x+<<+endl;|code-block|syntax|javascript|908982|entityMap|0|LINK|mutability|MUTABLE|url|http://www.qtcentre.org/threads/33506-where-is-cout-in-Qt-Creator^0|3|4|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

I found <a href="http://www.qtcentre.org/threads/33506-where-is-cout-in-Qt-Creator" rel="noreferrer">this</a> most useful:

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

QTextStream out(stdout);
foreach(QString x, strings)
 out &lt;&lt; x &lt;&lt; endl;
</code></pre>

blocks|key|1123896|text|将此代码添加到项目文件中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1123897|CONFIG+%2B=+console|code-block|syntax|javascript|1123898|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|$]]

Add this to your project file:

<pre><code>CONFIG += console
</code></pre>

blocks|key|908881|text|您想打印哪些变量？如果您指的是QStrings，则需要将这些字符串转换为c-Strings。尝试：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|908882|std::cout+<<+myString.toAscii().data();|code-block|syntax|javascript|908883|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|$]]

What variables do you want to print? If you mean QStrings, those need to be converted to c-Strings. Try:

<pre><code>std::cout &lt;&lt; myString.toAscii().data();
</code></pre>

blocks|key|909002|text|它还具有类似于prinft的语法，例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|909003|qDebug+("message+%25d,+says:+%25s",num,str);+|code-block|syntax|javascript|909004|也非常方便。|909005|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|$]]

It also has a syntax similar to prinft, e.g.:

<pre><code>qDebug ("message %d, says: %s",num,str); 
</code></pre>

Very handy as well

blocks|key|1124008|text|转到项目的Properties+->+Linker->+System+->+SubSystem，然后将其设置为Console(/S)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1124009|entityMap^0|5|16|1J|B|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

Go the Project's <code>Properties -&gt; Linker-&gt; System -&gt; SubSystem</code>, then set it to <code>Console(/S)</code>.

blocks|key|1124063|text|如果您使用stdio库打印到stderr，则调用fflush(stderr)应该会刷新缓冲区并获得实时日志记录。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1124064|entityMap^0|O|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|$]]

If you are printing to stderr using the stdio library, a call to <code>fflush(stderr)</code> should flush the buffer and get you real-time logging.

blocks|key|909156|text|在研究了互联网上描述如何将消息从Qt中的图形用户界面输出到标准输出的几个示例之后，我精炼了一个关于通过qDebug()和安装qInstallMessageHandler()将消息重定向到控制台的独立工作示例。控制台将与GUI同时显示，并可在必要时隐藏。该代码很容易与项目中的现有代码集成。这是完整的样例，只要您遵守许可证GNU+GPL+v2，就可以按您喜欢的方式使用它。你必须使用某种形式和我认为的MainWindow+-否则示例将运行，但在被迫退出时可能会崩溃。注意:没有办法通过关闭按钮或菜单关闭退出，因为我已经测试过这些替代方案，应用程序最终会时不时地崩溃。没有关闭按钮，应用程序将是稳定的，您可以从主窗口关闭它。享受吧！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|909157|#include+"mainwindow.h"
#include+<QApplication>

//GNU+GPL+V2,+2015-02-07
#include+<QMessageBox>
#include+<windows.h>
#define+CONSOLE_COLUMNS+80
#define+CONSOLE_ROWS++++5000
#define+YOURCONSOLETITLE+"Your_Console_Title"

typedef+struct{

++++CONSOLE_SCREEN_BUFFER_INFOEX+conScreenBuffInfoEX;

++++HANDLE+con_screenbuf;
++++HWND+hwndConsole;
++++HMENU+consoleMenu+;
++++QString+consoleTitle;

++++QMessageBox+mBox;
++++QString+localMsg;
++++QString+errorMessage;
++++WINBOOL+errorCode;

}+consoleT;

static+consoleT+*console;

BOOL+WINAPI+catchCTRL(+DWORD+ctrlMsg+){

++++++++if(+ctrlMsg+==+CTRL_C_EVENT+){

++++++++++++HWND+hwndWin+=+GetConsoleWindow();
+++++++++++++++ShowWindow(hwndWin,SW_FORCEMINIMIZE);
++++++++}

++++return+TRUE;
}

void+removeCloseMenu(){

++++int+i;

++++for(+i+=+0;+i+<+10;+i%2B%2B){

++++++++console->hwndConsole+=+FindWindowW(+NULL,+console->consoleTitle.toStdWString().data());

++++++++if(console->hwndConsole+!=+NULL)
++++++++++++break;
++++}

++++if(+!(console->errorCode+=+0)+&&+(console->hwndConsole+==+NULL))
++++++++++++console->errorMessage+%2B=+QString("\nFindWindowW+error:+%251+\n").arg(console->errorCode);

++++if(+!(console->errorCode+=+0)+&&++!(console->consoleMenu+=+GetSystemMenu(+console->hwndConsole,+FALSE+))+)
++++++++console->errorMessage+%2B=+QString("GetSystemMenu+error:+%251+\n").arg(console->errorCode);

++++if(!(console->errorCode+=+DeleteMenu(+console->consoleMenu,+SC_CLOSE,+MF_BYCOMMAND+)))
+++++++++++console->errorMessage+%2B=+QString("DeleteMenu+error:+%251+\n").arg(console->errorCode);
}

void+initialiseConsole(){

++++console->conScreenBuffInfoEX.cbSize+=+sizeof(CONSOLE_SCREEN_BUFFER_INFOEX);
++++console->consoleMenu+=+NULL;
++++console->consoleTitle+=+YOURCONSOLETITLE;
++++console->con_screenbuf+=+INVALID_HANDLE_VALUE;
++++console->errorCode+=+0;
++++console->errorMessage+=+"";
++++console->hwndConsole+=+NULL;
++++console->localMsg+=+"";

++++if(!(console->errorCode+=+FreeConsole()))
++++++++console->errorMessage+%2B=+QString("\nFreeConsole+error:+%251+\n").arg(console->errorCode);

++++if(!(console->errorCode+=+AllocConsole()))
++++++++console->errorMessage+%2B=+QString("\nAllocConsole+error:+%251+\n").arg(console->errorCode);

++++if(+(console->errorCode+=+-1)+&&+(INVALID_HANDLE_VALUE+==(console->con_screenbuf+=+CreateConsoleScreenBuffer(+GENERIC_WRITE+%7C+GENERIC_READ,0,+NULL,+CONSOLE_TEXTMODE_BUFFER,+NULL))))
++++++++console->errorMessage+%2B=+QString("\nCreateConsoleScreenBuffer+error:+%251+\n").arg(console->errorCode);

++++if(!(console->errorCode+=+SetConsoleActiveScreenBuffer(console->con_screenbuf)))
++++++++console->errorMessage+%2B=+QString("\nSetConsoleActiveScreenBuffer+error:+%251+\n").arg(console->errorCode);

++++if(!(console->errorCode+=+GetConsoleScreenBufferInfoEx(console->con_screenbuf,+&console->conScreenBuffInfoEX)))
++++++++console->errorMessage+%2B=+QString("\nGetConsoleScreenBufferInfoEx+error:+%251+\n").arg(console->errorCode);

++++console->conScreenBuffInfoEX.dwSize.X+=+CONSOLE_COLUMNS;
++++console->conScreenBuffInfoEX.dwSize.Y+=+CONSOLE_ROWS;

++++if(!(console->errorCode+=+SetConsoleScreenBufferInfoEx(console->con_screenbuf,+&console->conScreenBuffInfoEX)))
+++++++console->errorMessage+%2B=+QString("\nSetConsoleScreenBufferInfoEx+error:+%251+\n").arg(console->errorCode);

++++if(!(console->errorCode+=+SetConsoleTitleW(console->consoleTitle.toStdWString().data())))
++++++++console->errorMessage+%2B=+QString("SetConsoleTitle+error:+%251+\n").arg(console->errorCode);

++++SetConsoleCtrlHandler(NULL,+FALSE);
++++SetConsoleCtrlHandler(catchCTRL,+TRUE);

++++removeCloseMenu();

++++if(console->errorMessage.length()+>+0){
++++++++console->mBox.setText(console->errorMessage);
++++++++console->mBox.show();
++++}

}

void+messageHandler(QtMsgType+type,+const+QMessageLogContext+&context,+const+QString+&msg){


++++if((console->con_screenbuf+!=+INVALID_HANDLE_VALUE)){

++++++++switch+(type)+{

++++++++case+QtDebugMsg:
++++++++++++console->localMsg+=+console->errorMessage+%2B+"Debug:+"+%2B+msg;
++++++++++++WriteConsoleW(console->con_screenbuf,+console->localMsg.toStdWString().data(),+console->localMsg.toStdWString().length(),+NULL,+NULL+);
++++++++++++WriteConsoleA(console->con_screenbuf,+"\n--\n",+4,+NULL,+NULL+);
++++++++++++break;

++++++++case+QtWarningMsg:
++++++++++++console->localMsg+=+console->errorMessage+%2B+"Warning:+"+%2B+msg;
++++++++++++WriteConsoleW(console->con_screenbuf,+console->localMsg.toStdWString().data(),+console->localMsg.toStdWString().length()+,+NULL,+NULL+);
++++++++++++WriteConsoleA(console->con_screenbuf,+"\n--\n",+4,+NULL,+NULL+);
++++++++++++break;

++++++++case+QtCriticalMsg:
++++++++++++console->localMsg+=+console->errorMessage+%2B+"Critical:+"+%2B+msg;
++++++++++++WriteConsoleW(console->con_screenbuf,+console->localMsg.toStdWString().data(),+console->localMsg.toStdWString().length(),+NULL,+NULL+);
++++++++++++WriteConsoleA(console->con_screenbuf,+"\n--\n",+4,+NULL,+NULL+);
++++++++++++break;

++++++++case+QtFatalMsg:
++++++++++++console->localMsg+=+console->errorMessage+%2B+"Fatal:+"+%2B+msg;
++++++++++++WriteConsoleW(console->con_screenbuf,+console->localMsg.toStdWString().data(),+console->localMsg.toStdWString().length(),+NULL,+NULL+);
++++++++++++WriteConsoleA(console->con_screenbuf,+"\n--\n",+4,+NULL,+NULL+);
++++++++++++abort();
++++++++}
++++}
}



int+main(int+argc,+char+*argv[])
{

++++qInstallMessageHandler(messageHandler);

++++QApplication+a(argc,+argv);

++++console+=+new+consoleT();
++++initialiseConsole();

++++qDebug()+<<+"Hello+World!";

++++MainWindow+w;
++++w.show();

++++return+a.exec();
}|code-block|syntax|javascript|909158|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|$]]

Well, after studying several examples on the Internet describing how to output messages from a GUI in Qt to stdout, I have refined a working stand-alone example on redirecting messages to a console, via qDebug() and installing qInstallMessageHandler(). The console will be showed at the same time as the GUI and can be hidden if deemed necessary. The code is easy to integrate with existing code in your project. Here is the full sample and feel free to use it in any way as you like, as long as you adhere to the License GNU GPL v2. You have to use a form of some sort and a MainWindow I think - otherwise the sample will run, but probably crash when forced to quit. Note: there is no way to quit via a close button or a menu close because I have tested those alternatives and the application will crash eventually every now and then. Without the close button the application will be stable and you can close it down from the main window. Enjoy!

<pre><code>#include "mainwindow.h"
#include &lt;QApplication&gt;

//GNU GPL V2, 2015-02-07
#include &lt;QMessageBox&gt;
#include &lt;windows.h&gt;
#define CONSOLE_COLUMNS 80
#define CONSOLE_ROWS 5000
#define YOURCONSOLETITLE "Your_Console_Title"

typedef struct{

 CONSOLE_SCREEN_BUFFER_INFOEX conScreenBuffInfoEX;

 HANDLE con_screenbuf;
 HWND hwndConsole;
 HMENU consoleMenu ;
 QString consoleTitle;

 QMessageBox mBox;
 QString localMsg;
 QString errorMessage;
 WINBOOL errorCode;

} consoleT;

static consoleT *console;

BOOL WINAPI catchCTRL( DWORD ctrlMsg ){

 if( ctrlMsg == CTRL_C_EVENT ){

 HWND hwndWin = GetConsoleWindow();
 ShowWindow(hwndWin,SW_FORCEMINIMIZE);
 }

 return TRUE;
}

void removeCloseMenu(){

 int i;

 for( i = 0; i &lt; 10; i++){

 console-&gt;hwndConsole = FindWindowW( NULL, console-&gt;consoleTitle.toStdWString().data());

 if(console-&gt;hwndConsole != NULL)
 break;
 }

 if( !(console-&gt;errorCode = 0) &amp;&amp; (console-&gt;hwndConsole == NULL))
 console-&gt;errorMessage += QString("\nFindWindowW error: %1 \n").arg(console-&gt;errorCode);

 if( !(console-&gt;errorCode = 0) &amp;&amp; !(console-&gt;consoleMenu = GetSystemMenu( console-&gt;hwndConsole, FALSE )) )
 console-&gt;errorMessage += QString("GetSystemMenu error: %1 \n").arg(console-&gt;errorCode);

 if(!(console-&gt;errorCode = DeleteMenu( console-&gt;consoleMenu, SC_CLOSE, MF_BYCOMMAND )))
 console-&gt;errorMessage += QString("DeleteMenu error: %1 \n").arg(console-&gt;errorCode);
}

void initialiseConsole(){

 console-&gt;conScreenBuffInfoEX.cbSize = sizeof(CONSOLE_SCREEN_BUFFER_INFOEX);
 console-&gt;consoleMenu = NULL;
 console-&gt;consoleTitle = YOURCONSOLETITLE;
 console-&gt;con_screenbuf = INVALID_HANDLE_VALUE;
 console-&gt;errorCode = 0;
 console-&gt;errorMessage = "";
 console-&gt;hwndConsole = NULL;
 console-&gt;localMsg = "";

 if(!(console-&gt;errorCode = FreeConsole()))
 console-&gt;errorMessage += QString("\nFreeConsole error: %1 \n").arg(console-&gt;errorCode);

 if(!(console-&gt;errorCode = AllocConsole()))
 console-&gt;errorMessage += QString("\nAllocConsole error: %1 \n").arg(console-&gt;errorCode);

 if( (console-&gt;errorCode = -1) &amp;&amp; (INVALID_HANDLE_VALUE ==(console-&gt;con_screenbuf = CreateConsoleScreenBuffer( GENERIC_WRITE | GENERIC_READ,0, NULL, CONSOLE_TEXTMODE_BUFFER, NULL))))
 console-&gt;errorMessage += QString("\nCreateConsoleScreenBuffer error: %1 \n").arg(console-&gt;errorCode);

 if(!(console-&gt;errorCode = SetConsoleActiveScreenBuffer(console-&gt;con_screenbuf)))
 console-&gt;errorMessage += QString("\nSetConsoleActiveScreenBuffer error: %1 \n").arg(console-&gt;errorCode);

 if(!(console-&gt;errorCode = GetConsoleScreenBufferInfoEx(console-&gt;con_screenbuf, &amp;console-&gt;conScreenBuffInfoEX)))
 console-&gt;errorMessage += QString("\nGetConsoleScreenBufferInfoEx error: %1 \n").arg(console-&gt;errorCode);

 console-&gt;conScreenBuffInfoEX.dwSize.X = CONSOLE_COLUMNS;
 console-&gt;conScreenBuffInfoEX.dwSize.Y = CONSOLE_ROWS;

 if(!(console-&gt;errorCode = SetConsoleScreenBufferInfoEx(console-&gt;con_screenbuf, &amp;console-&gt;conScreenBuffInfoEX)))
 console-&gt;errorMessage += QString("\nSetConsoleScreenBufferInfoEx error: %1 \n").arg(console-&gt;errorCode);

 if(!(console-&gt;errorCode = SetConsoleTitleW(console-&gt;consoleTitle.toStdWString().data())))
 console-&gt;errorMessage += QString("SetConsoleTitle error: %1 \n").arg(console-&gt;errorCode);

 SetConsoleCtrlHandler(NULL, FALSE);
 SetConsoleCtrlHandler(catchCTRL, TRUE);

 removeCloseMenu();

 if(console-&gt;errorMessage.length() &gt; 0){
 console-&gt;mBox.setText(console-&gt;errorMessage);
 console-&gt;mBox.show();
 }

}

void messageHandler(QtMsgType type, const QMessageLogContext &amp;context, const QString &amp;msg){


 if((console-&gt;con_screenbuf != INVALID_HANDLE_VALUE)){

 switch (type) {

 case QtDebugMsg:
 console-&gt;localMsg = console-&gt;errorMessage + "Debug: " + msg;
 WriteConsoleW(console-&gt;con_screenbuf, console-&gt;localMsg.toStdWString().data(), console-&gt;localMsg.toStdWString().length(), NULL, NULL );
 WriteConsoleA(console-&gt;con_screenbuf, "\n--\n", 4, NULL, NULL );
 break;

 case QtWarningMsg:
 console-&gt;localMsg = console-&gt;errorMessage + "Warning: " + msg;
 WriteConsoleW(console-&gt;con_screenbuf, console-&gt;localMsg.toStdWString().data(), console-&gt;localMsg.toStdWString().length() , NULL, NULL );
 WriteConsoleA(console-&gt;con_screenbuf, "\n--\n", 4, NULL, NULL );
 break;

 case QtCriticalMsg:
 console-&gt;localMsg = console-&gt;errorMessage + "Critical: " + msg;
 WriteConsoleW(console-&gt;con_screenbuf, console-&gt;localMsg.toStdWString().data(), console-&gt;localMsg.toStdWString().length(), NULL, NULL );
 WriteConsoleA(console-&gt;con_screenbuf, "\n--\n", 4, NULL, NULL );
 break;

 case QtFatalMsg:
 console-&gt;localMsg = console-&gt;errorMessage + "Fatal: " + msg;
 WriteConsoleW(console-&gt;con_screenbuf, console-&gt;localMsg.toStdWString().data(), console-&gt;localMsg.toStdWString().length(), NULL, NULL );
 WriteConsoleA(console-&gt;con_screenbuf, "\n--\n", 4, NULL, NULL );
 abort();
 }
 }
}



int main(int argc, char *argv[])
{

 qInstallMessageHandler(messageHandler);

 QApplication a(argc, argv);

 console = new consoleT();
 initialiseConsole();

 qDebug() &lt;&lt; "Hello World!";

 MainWindow w;
 w.show();

 return a.exec();
}
</code></pre>

blocks|key|909242|text|"build+&+run“>默认”在终端运行“-->启用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|909243|要刷新缓冲区，请使用以下命令-->+fflush(stdout)；您也可以在printf或cout中使用"\n“。|offset|length|style|CODE|909244|entityMap^0|0|12|6|19|4|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]|$D|N|E|O|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|P|8|@]|9|@]|A|$]]]|I|$]]

"build &amp; run" > Default for "Run in terminal" --> Enable

to flush the buffer use this command --> fflush(stdout);
you can also use "\n" in <code>printf</code> or <code>cout</code>.

I'm using Qt4 and C++ for making some programs in computer graphics. I need to be able to print some variables in my console at run-time, not debugging, but <code>cout</code> doesn't seem to work even if I add the libraries. Is there a way to do this?

How to print to console when using Qt

我正在用Qt4和C++做一些计算机图形学的程序。我需要能够在运行时打印控制台中的一些变量，而不是调试，但是即使我添加库，cout似乎也不能工作。有没有办法做到这一点？

问如何在使用Qt时打印到控制台
EN

回答 9

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在使用Qt时打印到控制台EN

回答 9

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在使用Qt时打印到控制台
EN