I am working on the same example with QT 4.8.4 and QT Creator 2.6.2. When I run it, several errors including the followings occur. I have tried all the ways from the forum but I haven’t fixed.

I have cleaned the project, rebuild and run qmake. But, it doesn’t solve. Any help is appreciated.

Regards,

1. error: C2628: ‘FindDialog’ followed by ‘int’ is illegal (did you forget a ‘;’?)
2. error: C3874: return type of ‘main’ should be ‘int’ instead of ‘FindDialog’ 3. error: C2664: ‘FindDialog::FindDialog(QWidget *)’ : cannot convert parameter 1 from ‘int’ to ‘QWidget *’
3. Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast

@ //finddialog.cpp
#include <QtGui>
#include "FindDialog.h"

FindDialog::FindDialog(QWidget *parent)
        : QDialog(parent){
    label = new QLabel(tr("Find &what: "));
    lineEdit = new QLineEdit;
    label->setBuddy(lineEdit);
 
    caseCheckBox = new QCheckBox(tr("Match &case"));
    backwardCheckBox = new QCheckBox(tr("Search &Backward"));
 
    findButton = new QPushButton(tr("&Find"));
    findButton->setDefault(true);
    findButton->setEnabled(false);
 
    closeButton = new QPushButton(tr("Close"));
 
    connect(lineEdit, SIGNAL(textChanged(QString &)),this, SLOT(enableFindButton(QString &)));
    connect(findButton, SIGNAL(clicked()), this, SLOT(findclicked()));
    connect(closeButton, SIGNAL(clicked()), this, SLOT(close()));
 
    QHBoxLayout *topLeftLayout = new QHBoxLayout;
    topLeftLayout->addWidget(label);
    topLeftLayout->addWidget(lineEdit);
 
    QVBoxLayout *leftLayout = new QVBoxLayout;
    leftLayout->addLayout(topLeftLayout);
    leftLayout->addWidget(caseCheckBox);
    leftLayout->addWidget(backwardCheckBox);
 
    QVBoxLayout *rightLayout = new QVBoxLayout;
    rightLayout->addWidget(findButton);
    rightLayout->addWidget(closeButton);
    rightLayout->addStretch();
 
    QHBoxLayout *mainLayout = new QHBoxLayout;
    mainLayout->addLayout(leftLayout);
    mainLayout->addLayout(rightLayout);
    setLayout(mainLayout);
 
    setWindowTitle(tr("Find"));
    setFixedHeight(sizeHint().height());
 
}
 
void FindDialog::findClicked() // kullanici find butonunu tıkladığında calisir
{
    QString text = lineEdit->text();
 
    Qt::CaseSensitivity cs = caseCheckBox->isChecked() ? Qt::CaseSensitive : Qt::CaseInsensitive;
 
    if (backwardCheckBox->isChecked()) { //backward Checkbox secili ise findPrevious sinyali yayar
        emit findPrevious(text, cs);}
    else {
        emit findNext(text, cs);}
}
 
 void FindDialog::enableFindButton(const QString &text) // satır editöründe metin degisiligi olunca finbutton calistirilir...
{
  findButton->setEnabled(!text.isEmpty());
}

//finddialog.h
#ifndef FINDDIALOG_H
#define FINDDIALOG_H
 
#include <QDialog>
 
class QCheckbox;
class QLabel;
class QLineEdit;
class QPushButton;
 
class FindDialog : public QDialog
{
    Q_OBJECT
 
public:
    FindDialog (QWidget *parent = 0);
signals: // sinyal bildirimleri
    void findNext(const QString &str, Qt::CaseSensitivity cs);
    void findPrevious(const QString &str, Qt::CaseSensitivity cs);
private slots: // yuva bildirimleri
    void findclicked();
    void enableFindButton(const QString &text);
private:
    QLabel *label;
    QLineEdit *lineEdit;
    QCheckbox *caseCheckBox;
    QCheckbox *backwardCheckBox;
    QPushButton *findButton;
    QPushButton *closeButton;
}
 
#endif // FINDDIALOG_H

//main.cpp
#include <QApplication>
#include "FindDialog.h"
 
int main(int argc, char *argv[])
{
 
    QApplication app(argc, argv);
    FindDialog *dialog = new FindDialog;
 
    dialog->show();
    return app.exec();
}

@