Why there is not console window?

It's an example from C++ GUI programming with Qt 4.
In this example, the book tells: the threads will print message to the console. but I cann't find even the console!

Code:

---

void Thread::run()
{
    while (!stopped)
        std::cerr << qPrintable(messageStr);
    stopped = false;
    std::cerr << std::endl;
}
 
 
 
// the pro file
 
TEMPLATE      = app
CONFIG       += console thread
HEADERS       = thread.h \
                threaddialog.h
SOURCES       = main.cpp \
                thread.cpp \
                threaddialog.cpp

---

Why? thanks!

run you program in command prompt.

Quote:

---

Originally Posted by spirit

run you program in command prompt.

---

I do run it in command prompt always . but find nothing.