/*char z2[15];
                system("cls");
                printf("1- by name\n2- by id\n");
                printf("your choice: ");
                scanf(" %[^\n]s",z2);
                int x2=atoi(z2);
                if(x2==1)
                {
                    system("cls");
                    printf("Enter name: ");
                    while((c= getchar()) != '\n' && c != EOF);
                    gets(name);
                    node_id* temp = search_name(&root_name, name);
                    if (temp != NULL)
                    {
                        id = temp->id;
                    }
                    if(temp == NULL)
                        printf("NOT FOUND.\n\n");
                    else
                    {
                        root_id = delete_id(root_id, id);
                        root_name = delete_name(root_name, name);
                        printf("\n%d  %s has been deleted succesfuly.\n\n",id,name);
                    }
                }

                else if(x2==2)
                {
                    system("cls");
                    printf("Enter id: ");
                    scanf("%d", &id);
                    node_id* temp = search_id(&root_id, id);
                    if (temp != NULL)
                    {
                        strcpy(name, temp->name);
                    }
                    if(temp==NULL)
                        printf("NOT FOUND.\n\n");
                    else
                    {
                        root_id = delete_id(root_id, id);
                        root_name = delete_name(root_name,name);
                        printf("\n%d  %s has been deleted succesfuly.\n\n",id,name);
                    }
                }
                else
                {
                    system("cls");
                    printf("enter a valid choice.\n");
                    break;
                }
                break;*/