How to show dialog(only .ui)

[ditsikts]

I find similar questions like mine, but i didnt find out how to do this
This is my first app, please help

mainwindow.ccp

#include "mainwindow.h"
#include "ui_mainwindow.h"
 
 
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
 
    connect(ui->actionQuit, SIGNAL(triggered()), qApp, SLOT(quit()));
    connect(ui->actionInsert,SIGNAL(triggered())),qApp,SLOT(insertEmployee());
}
 
MainWindow::~MainWindow()
{
    delete ui;
}
 
void MainWindow::insertEmployee()
{
    //[B]here we call/create dialog.ui[/B]
 
}

#include "mainwindow.h"
#include "ui_mainwindow.h"


MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    connect(ui->actionQuit, SIGNAL(triggered()), qApp, SLOT(quit()));
    connect(ui->actionInsert,SIGNAL(triggered())),qApp,SLOT(insertEmployee());
}

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

void MainWindow::insertEmployee()
{
    //[B]here we call/create dialog.ui[/B]

}

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mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <QMainWindow>
 
namespace Ui {
    class MainWindow;
}
 
class MainWindow : public QMainWindow
{
    Q_OBJECT
 
public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
 
public slots:
    void insertEmployee();
 
private:
    Ui::MainWindow *ui;
};
 
#endif // MAINWINDOW_H

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
    class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

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

public slots:
    void insertEmployee();

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

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aaasa.pro

QT       += core gui
QT       += sql
 
TARGET = aaasa
TEMPLATE = app
 
 
SOURCES += main.cpp\
        mainwindow.cpp
 
HEADERS  += mainwindow.h
 
FORMS    += mainwindow.ui \
    dialog.ui

QT       += core gui
QT       += sql

TARGET = aaasa
TEMPLATE = app


SOURCES += main.cpp\
        mainwindow.cpp

HEADERS  += mainwindow.h

FORMS    += mainwindow.ui \
    dialog.ui

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[ditsikts]

ok, i solve my problem