Add new file

userwindow.h

+#ifndef USERWINDOW_H
+#define USERWINDOW_H
+
+#include <QMainWindow>
+#include <showtable.h>
+#include <QSqlDatabase>
+#include <QInputDialog>
+#include <QSqlError>
+#include <QMessageBox>
+
+namespace Ui {
+class UserWindow;
+}
+
+class UserWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    explicit UserWindow(QWidget *parent = 0);
+    ~UserWindow();
+
+public slots:
+    void getdata(QSqlDatabase db1, QString tablename1);
+signals:
+    void sendata(QSqlDatabase,QString);
+
+private slots:
+    void on_usrtable_clicked();
+
+    void on_find_usr_clicked();
+
+    void on_delet_usr_clicked();
+
+    void on_goback_clicked();
+
+    void on_updata_usr_clicked();
+
+private:
+    Ui::UserWindow *ui;
+    ShowTable *table;
+    QSqlDatabase db;
+    QString tablename;
+};
+
+#endif // USERWINDOW_H