QTableWidget Manipulate

snippet_qtablewidget.cpp

void MainWindow::attendance_table(){
    //QTableWidgetItem *itm = new QTableWidgetItem();
       ui->att_table->setColumnCount(15);
    QStringList label;
    label <<tr("ID") << tr("Name") << tr("1") << tr("2") << tr("3") << tr("4") << tr("5") << tr("6") << tr("7") << tr("8") << tr("9") << tr("10") << tr("11") << tr("12") << tr("13") ;
    ui->att_table->setHorizontalHeaderLabels(label);
    ui->att_table->verticalHeader()->hide();
    ui->att_table->setShowGrid(false);

   // QTableWidgetItem *itm = new QTableWidgetItem(tr("Name"));
    //ui->att_table->setItem(0,0,itm);
}