Errors for dialog.obj

[yangcong955]

Hi Guys,

I will be appriciate if someone could give me some suggestions regarding some errors I got.

environment: Qt5.2.1 + MS Visual Studio 2010.
Since I'm a new fish for Qt development, and I try to program a small application to evaluate my environment setup. Followings are codes:

dialog.h
@#pragma once

#ifndef DIALOG_H
#define DIALOG_H

#include <QtWidgets\qdialog.h>

namespace Ui {
class Dialog;
}

class Dialog : public QDialog
{
Q_OBJECT

public:
explicit Dialog(QWidget *parent = 0);
~Dialog();

private slots:
void on_countBtn_clicked();

void on_radiusLineEdit_textChanged(const QString &arg1);

private:
Ui::Dialog *ui;
};

#endif // DIALOG_H@

ui-dialog.h
@#pragma once
/********************************************************************************
** Form generated from reading UI file 'dialog.ui'
**
** Created by: Qt User Interface Compiler version 5.0.2
**
** WARNING! All changes made in this file will be lost when recompiling UI file!
********************************************************************************/

#ifndef UI_DIALOG_H
#define UI_DIALOG_H

#include <QtCore/QVariant>
#include <QtWidgets/QAction>
#include <QtWidgets/QApplication>
#include <QtWidgets/QButtonGroup>
#include <QtWidgets/QDialog>
#include <QtWidgets/QHeaderView>
#include <QtWidgets/QLabel>
#include <QtWidgets/QLineEdit>
#include <QtWidgets/QPushButton>

QT_BEGIN_NAMESPACE

class Ui_Dialog
{
public:
QLabel *radiusLabel;
QLabel *areaLabel_1;
QLabel *areaLabel_2;
QLineEdit *radiusLineEdit;
QPushButton *countBtn;

void setupUi(QDialog *Dialog)
{
    if (Dialog->objectName().isEmpty())
        Dialog->setObjectName(QStringLiteral("Dialog"));
    Dialog->resize(333, 129);
    radiusLabel = new QLabel(Dialog);
    radiusLabel->setObjectName(QStringLiteral("radiusLabel"));
    radiusLabel->setGeometry(QRect(20, 40, 41, 21));
    areaLabel_1 = new QLabel(Dialog);
    areaLabel_1->setObjectName(QStringLiteral("areaLabel_1"));
    areaLabel_1->setGeometry(QRect(160, 40, 31, 21));
    areaLabel_2 = new QLabel(Dialog);
    areaLabel_2->setObjectName(QStringLiteral("areaLabel_2"));
    areaLabel_2->setGeometry(QRect(200, 40, 101, 21));
    areaLabel_2->setFrameShape(QFrame::Panel);
    areaLabel_2->setFrameShadow(QFrame::Sunken);
    radiusLineEdit = new QLineEdit(Dialog);
    radiusLineEdit->setObjectName(QStringLiteral("radiusLineEdit"));
    radiusLineEdit->setGeometry(QRect(60, 40, 81, 20));
    countBtn = new QPushButton(Dialog);
    countBtn->setObjectName(QStringLiteral("countBtn"));
    countBtn->setGeometry(QRect(230, 80, 75, 23));

    retranslateUi(Dialog);

    QMetaObject::connectSlotsByName(Dialog);
} // setupUi

void retranslateUi(QDialog *Dialog)
{
    Dialog->setWindowTitle(QApplication::translate("Dialog", "Dialog", 0));
    radiusLabel->setText(QApplication::translate("Dialog", "\345\215\212\345\276\204\357\274\232", 0));
    areaLabel_1->setText(QApplication::translate("Dialog", "\351\235\242\347\247\257\357\274\232", 0));
    areaLabel_2->setText(QString());
    countBtn->setText(QApplication::translate("Dialog", "\350\256\241\347\256\227", 0));
} // retranslateUi

};

namespace Ui {
class Dialog: public Ui_Dialog {};
} // namespace Ui

QT_END_NAMESPACE

#endif // UI_DIALOG_H
@

dialog.cpp
@#include "dialog.h"
#include "ui_dialog.h"

const static double PI=3.1416;

Dialog::Dialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::Dialog)
{
ui->setupUi(this);
}

Dialog::~Dialog()
{
delete ui;
}

void Dialog::on_countBtn_clicked()
{
bool ok;
QString tempStr;
QString valueStr=ui->radiusLineEdit->text();
int valueInt=valueStr.toInt(&ok);
double area=valueIntvalueIntPI;//
ui->areaLabel_2->setText(tempStr.setNum(area));
}

void Dialog::on_radiusLineEdit_textChanged(const QString &arg1)
{
bool ok;
QString tempStr;
QString valueStr=ui->radiusLineEdit->text();
int valueInt=valueStr.toInt(&ok);
double area=valueIntvalueIntPI;//
ui->areaLabel_2->setText(tempStr.setNum(area));
}@

main.cpp
@#include "dialog.h"
#include <QtWidgets/qapplication.h>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Dialog w;
w.show();

return a.exec();

}@

All necessary libraries and included files are added in the project common properties.

When I tried to compile the previous codes, there are always some errors appears:

Error 1 error LNK2001: unresolved external symbol "public: virtual struct QMetaObject const * __thiscall Dialog::metaObject(void)const " (?metaObject@Dialog@@UBEPBUQMetaObject@@XZ) G:\MyProject\OpenCV\Qt\dialog.obj Qt

Error 2 error LNK2001: unresolved external symbol "public: virtual void * __thiscall Dialog::qt_metacast(char const *)" (?qt_metacast@Dialog@@UAEPAXPBD@Z) G:\MyProject\OpenCV\Qt\dialog.obj Qt

Error 3 error LNK2001: unresolved external symbol "public: virtual int __thiscall Dialog::qt_metacall(enum QMetaObject::Call,int,void * *)" (?qt_metacall@Dialog@@UAEHW4Call@QMetaObject@@HPAPAX@Z) G:\MyProject\OpenCV\Qt\dialog.obj Qt

Error 4 error LNK1120: 3 unresolved externals G:\MyProject\OpenCV\Debug\Qt.exe 1 1 Qt

Can some one tell me how to solve this problem? Thank you in advance!