Getting started with Qt

[spainchaud]

I am just starting with Qt (open source) and I am going through examples in An Introduction to Design Patterns in C++ with Qt 4. My C++ experience is with console applications, and I would like to learn about gui programming.

My problem is with the following example, slightly modified from the book (example 4.1):

#include <QStringList>
#include <QDebug>
#include <iostream>
 
using namespace std;
 
/* Some simple examples using QStringList, split and join */
 
int main() {
    QString winter = "December, January, February";
    QString spring = "March, April, May";
    QString summer = "June, July, August";
    QString fall = "September, October, November";
 
    QStringList list;
    list << winter; 
    list += spring; 
    list.append(summer); 
    list << fall;
 
    qDebug() << "The Spring months are: " << list[1] ;
    cout << "Hi" << endl;
 
    QString allmonths = list.join(", "); 
    /* from list to string - join with a ", " delimiter */
    qDebug() << allmonths;
 
    QStringList list2 = allmonths.split(", "); 
    /* split is the opposite of join. Each month will have its own element. */
 
    Q_ASSERT(list2.size() == 12); 
 
    foreach (QString str, list) { 
        qDebug() << QString(" [%1] ").arg(str);
    }
 
    for (QStringList::iterator it = list.begin();
        it != list.end(); ++it) { 
        QString current = *it; 
        qDebug() << "[[" << current << "]]";
    }
 
    QListIterator<QString> itr (list2); 
    while (itr.hasNext()) { 
        QString current = itr.next();
        qDebug() << "{" << current << "}";
    }
 
    return 0;
}

#include <QStringList>
#include <QDebug>
#include <iostream>

using namespace std;

/* Some simple examples using QStringList, split and join */

int main() {
    QString winter = "December, January, February";
    QString spring = "March, April, May";
    QString summer = "June, July, August";
    QString fall = "September, October, November";

    QStringList list;
    list << winter; 
    list += spring; 
    list.append(summer); 
    list << fall;

    qDebug() << "The Spring months are: " << list[1] ;
    cout << "Hi" << endl;

    QString allmonths = list.join(", "); 
    /* from list to string - join with a ", " delimiter */
    qDebug() << allmonths;

    QStringList list2 = allmonths.split(", "); 
    /* split is the opposite of join. Each month will have its own element. */

    Q_ASSERT(list2.size() == 12); 

    foreach (QString str, list) { 
        qDebug() << QString(" [%1] ").arg(str);
    }

    for (QStringList::iterator it = list.begin();
        it != list.end(); ++it) { 
        QString current = *it; 
        qDebug() << "[[" << current << "]]";
    }

    QListIterator<QString> itr (list2); 
    while (itr.hasNext()) { 
        QString current = itr.next();
        qDebug() << "{" << current << "}";
    }

    return 0;
}

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To create the executable I used the commands

qmake -project
 
qmake
 
make release

qmake -project

qmake

make release

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I was expecting console output, but nothing happens when I run the executable. Neither the original example or my modified version seem to work. I suspect there is something I don't understand. So far the earlier book examples have worked.

I realise this is a very basic question. If this is not the right forum, please let me know.

[lyuts]

Give us your .pro file.

[mcosta]

Are you on MS Windows?

If Yes you have to write this in your .pro file

CONFIG += console

CONFIG += console

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[spainchaud]

The console spec must be it. I know that it is not in my project file. It will try it when I get home tonight. Thanks.