typedef struct node_pair_info	// declare structure for npi database
{
	char city1[20];
	char city2[20];
	int distance;
	struct node_pair_info *next;
} NPI;
 
NPI *add_nodes(NPI * item)
{
	int i;
	FILE *cities;
 
	cities = fopen("ukcities.txt", "r");
	if (cities == NULL)
		printf("Unable to open ukcities.txt\n");
 
	else {
 
		NPI *new_node;
		new_node = (NPI *) malloc(sizeof(NPI));
		new_node->next = NULL;
		fscanf(cities, "%s \t %s \t %d\n", new_node->city1,
			   new_node->city2, new_node->distance);
		gotoxy(20, 25);
		fprintf(stdout, "%s %s %d\n", new_node->city1, new_node->city2,
				new_node->distance);
 
	}
 
	fclose(cities);
 
	return 0;
}
 
int main(void)
{
	NPI *first = NULL, *current = NULL, *last = NULL;
	char response;
 
	system("cls");
 
	gotoxy(25, 18);
	printf("Enter 'a' to add all cars to list");
	gotoxy(40, 25);
	putch(' ');
	gotoxy(25, 25);
	printf("Enter command: ");
	response = getch();
	gotoxy(34, 40);
	putch(response);
 
	switch (response) {
	case 'a':
		current = last = add_nodes(last);
		break;
	}
 
	if (first == NULL)
		current = first = last;
 
	return 0;
}

		fscanf(cities, "%s \t %s \t %d\n", new_node->city1,
			   new_node->city2, &new_node->distance);