private void Button_Click_10(object sender, RoutedEventArgs e)
{
abc b = new abc();
b.zad10(a, Convert.ToInt32(Tb3.Text) / 100.0, Convert.ToInt32(Tb4.Text));
}
private void Button_Click_7(object sender, RoutedEventArgs e)
{
abc b = new abc();
b.zad7(a, Convert.ToInt32(Tb7.Text), Convert.ToInt32(Tb7_1.Text));
}