How do I create a simple Qt console application in C++?

Here is one simple way you could structure an application if you want an event loop running.

// main.cpp
#include <QtCore>

class Task : public QObject
{
    Q_OBJECT
public:
    Task(QObject *parent = 0) : QObject(parent) {}

public slots:
    void run()
    {
        // Do processing here

        emit finished();
    }

signals:
    void finished();
};

#include "main.moc"

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

    // Task parented to the application so that it
    // will be deleted by the application.
    Task *task = new Task(&a);

    // This will cause the application to exit when
    // the task signals finished.    
    QObject::connect(task, SIGNAL(finished()), &a, SLOT(quit()));

    // This will run the task from the application event loop.
    QTimer::singleShot(0, task, SLOT(run()));

    return a.exec();
}

Don't forget to add the

CONFIG += console 

flag in the qmake .pro file.

For the rest is just using some of Qt classes. One way I use it is to spawn processes cross-platform.

I managed to create a simple console "hello world" with QT Creator

used creator 2.4.1 and QT 4.8.0 on windows 7

two ways to do this

Plain C++

do the following

1. File- new file project
2. under projects select : other Project
3. select "Plain C++ Project"
4. enter project name 5.Targets select Desktop 'tick it'
5. project managment just click next
6. you can use c++ commands as normal c++

or

QT Console

1. File- new file project
2. under projects select : other Project
3. select QT Console Application
4. Targets select Desktop 'tick it'
5. project managment just click next
6. add the following lines (all the C++ includes you need)
7. add "#include 'iostream' "
8. add "using namespace std; "
9. after QCoreApplication a(int argc, cghar *argv[]) 10 add variables, and your program code..

example: for QT console "hello world"

file - new file project 'project name '

other projects - QT Console Application

Targets select 'Desktop'

project management - next

code:

    #include <QtCore/QCoreApplication>
    #include <iostream>
    using namespace std;
    int main(int argc, char *argv[])
    {
     QCoreApplication a(argc, argv);
     cout<<" hello world";
     return a.exec();
     }

ctrl -R to run

compilers used for above MSVC 2010 (QT SDK) , and minGW(QT SDK)

hope this helps someone

As I have just started to use QT recently and also searched the Www for info and examples to get started with simple examples still searching...

You don't need the QCoreApplication at all, just include your Qt objects as you would other objects, for example:

#include <QtCore>

int main()
{
    QVector<int> a; // Qt object

    for (int i=0; i<10; i++)
    {
        a.append(i);
    }

    /* manipulate a here */

    return 0;
}