#include <cstdio>
#include <cstdlib>
#include <CTIME>
#include <QtGui>
#include <QtCore>
#include <QObject>
#include <QMainWindow>
#include <QApplication>

const char CCH[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

class MyMainWindow : public QMainWindow{
    Q_OBJECT
    public:
        MyMainWindow(QWidget *parent = 0);
        QTimer *addTimer;
        QTimer *delTimer;
        QTableWidget *table;
        QPushButton *btnRemove;
    
    private slots:
        void removeRows();
        void insertRows();
    
    private:
        QString genLongString();
        void setupTable();
};