void lectures::on_del_article_clicked()
{
	int n=ui->articles->currentRow();
	QString del=ui->articles->currentItem()->text();
	for (int i=0;i<articles_there.length();i++)
	{
		if (articles_there[i]==del[0] && articles_there[i+1]==del[1] && articles_there[i+2]==del[2])
		{
			articles_there.remove(i,del.length()+1);
			delete ui->articles->item(n);
		}
	}

}