The complete code is as shown below...
mainwindow.h
@ #ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QtCore>
#include <QtGui>

#include <QMainWindow>
 
 
 
class MulModel : public QAbstractTableModel
{
public:
MulModel( int rows, int columns, QObject *parent = 0 );
Qt::ItemFlags flags( const QModelIndex &index ) const;
QVariant data( const QModelIndex &index, int role = Qt::DisplayRole ) const;
QVariant headerData( int section, Qt::Orientation orientation,
int role = Qt::DisplayRole ) const;
int rowCount( const QModelIndex &parent = QModelIndex() ) const;
int columnCount( const QModelIndex &parent = QModelIndex() ) const;
 
 
 
private:
int m_rows, m_columns;
};
#endif // MAINWINDOW_H@

mainwindow.cpp
@ #include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtCore>
#include <QtGui>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
}

MainWindow::~MainWindow()
{
delete ui;
}
 
 
 
MulModel::MulModel( int rows, int columns, QObject *parent ) :
QAbstractTableModel( parent )
{
m_rows = rows;
m_columns = columns;
}
 
 
 
int MulModel::rowCount( const QModelIndex &parent ) const
{
return m_rows;
}
 
 
 
 
int MulModel::columnCount( const QModelIndex &parent ) const
{
return m_columns;
}
 
 
 
QVariant MulModel::data( const QModelIndex &index, int role ) const
{
switch( role )
{
case Qt::DisplayRole:
return (index.row()+1) * (index.column()+1);
case Qt::ToolTipRole:
return QString( "%1 x %2" ).arg( index.row()+1 ).arg( index.column()+1 );
default:
return QVariant();
}
}
 
 
QVariant MulModel::headerData( int section,
Qt::Orientation orientation, int role ) const
{
if( role != Qt::DisplayRole )
return QVariant();
return section+1;
}
 
 
 
Qt::ItemFlags MulModel::flags( const QModelIndex &index ) const
{
if(!index.isValid())
return Qt::ItemIsEnabled;
return Qt::ItemIsSelectable | Qt::ItemIsEnabled;
}@

main.cpp
@
#include <QtGui/QApplication>
#include "mainwindow.h"
#include <QtCore>
#include <QtGui>
int main( int argc, char **argv )
{
QApplication app( argc, argv );
MulModel model( 12, 12 );
QTableView table;
table.setModel( &model );
table.show();
return app.exec();
}

@