Console output in a Qt GUI app?

Rob_9236 0
Viewed 140899

I have a Qt GUI application running on Windows that allows command-line options to be passed and under some circumstances I want to output a message to the console and then quit, for example:

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

  if (someCommandLineParam)
  {
    std::cout << "Hello, world!";
    return 0;
  }

  MainWindow w;
  w.show();

  return a.exec();
}

However, the console messages do not appear when I run the app from a command-prompt. Does anyone know how I can get this to work?

qt4 qt windows c++
17 Answers

One solution is to run powershell and redirect the output to whatever stream you want.

Below is an example of running powershell from cmd.exe and redirecting my_exec.exe output to both the console and an output.txt file:

powershell ".\my_exec.exe | tee output.txt"
user_74006230
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