sizeTickets_sold=d.sizeTickets_sold;
capacityTickets_sold=d.capacityTickets_sold;

if(this!=&d){

    Tickets_for_sale=d.Tickets_for_sale;

    Tickets_sold=new Ticket[d.capacity];

    for(int i=0;i<sizeTickets_sold;i++){
        Tickets_sold[i]=d.Tickets_sold[i];
    }
}

return* this;