cout或者printf的输出时直接输出到控制台console上，然后我想在控制台上获取这些输出，并且显示在一个text上，请问各位大侠有什么好方法没有，请说详细点，我才刚学qt不久，谢谢！！
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在Winodws下你可以利用ReadConsole来获取控制台的输出~~`
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QTextStream::QTextStream ( FILE * fileHandle, QIODevice::OpenMode openMode = QIODevice::ReadWrite )
Constructs a QTextStream that operates on fileHandle, using openMode to define the open mode. Internally, a QFile is created to handle the FILE pointer.
This constructor is useful for working directly with the common FILE based input and output streams: stdin, stdout and stderr.
Example:
int i = 5;
QTextStream out(stdout);
cout << i;
然后 用 QPlainTextEdit 显示 out
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试试重定向stdout至文件：
freopen ("myfile.txt","w",stdout);
//调用dll
...
printf ("printf is redirected to a file.\n");
fclose (stdout);