#include<stdio.h>
#include<stdlib.h>

struct fifo_node
{
    char name[20];
    char surname[20];
    int class;
    char station_A[20];
    char station_B[20];
    int price;
    int data;
    struct fifo_node *next;
};

struct fifo_pointers
{
    struct fifo_node *head, *tail;
} fifo;

void enqueue(struct fifo_pointers *fifo)
{
    struct fifo_node *new_node = (struct fifo_node *)malloc(sizeof(struct fifo_node));

    if(new_node)
    {
        new_node->next = NULL;

        if(fifo->head==NULL)
            fifo->head = fifo->tail = new_node;
        else {
          fifo->tail->next=new_node;
          fifo->tail=new_node;}

        puts("PODAJ IMIE:\n");
        scanf("%s",new_node->name);

        puts("PODAJ NAZWISKO:\n");
        scanf("%s",new_node->surname);

        do
        {
            printf("Podaj klase (1 lub 2):\n");
            scanf("%d",&new_node->class);
        }while(new_node->class<0 || new_node->class>2);

        puts("PODAJ PUNKT POCZATKOWY:\n");
        scanf("%s",new_node->station_A);

        puts("PODAJ PUNKT DOCELOWY:\n");
        scanf("%s",new_node->station_B);
    }
}

void print_queue(struct fifo_pointers fifo)
{
    while(fifo.head) {
        printf("%d ",fifo.head->data);
        fifo.head = fifo.head->next;
    }
    puts("");
}

void print_queue_with_for(struct fifo_pointers fifo)
{
    for(;fifo.head;fifo.head=fifo.head->next)
        printf("%d ",fifo.head->data);
    puts("");
}

int main(void)
{
  srand(time(NULL));
    int i,a;

       while(1)
         {
             printf("\n\n1. DODAJ OSOBE:\n");
             printf("2. WYSWIETL I USUN CALA KOLEJKE:\n");
             printf("3. WYJSCIE\n");
             scanf("%d",&a);
             if(a==1)
             {
                 enqueue(&fifo);
             }
             if(a==2)
             {
                 while(fifo.head!=NULL)
                 {
                     printf("\n*****************");
                     printf("\nImie pasazera:%s\n",fifo.head->name);
                     printf("Nazwisko pasazera:%s\n",fifo.head->surname);
                     printf("Klasa pociagu:%d\n",fifo.head->class);
                     printf("Punkt poczatkowy:%s\n",fifo.head->station_A);
                     printf("Punkt docelowy:%s\n",fifo.head->station_B);
                     printf("Cena biletu:%lf\n",fifo.head->price);
                     fifo.head=fifo.head->next;
                 }
                 if(fifo.head==NULL && a==2)
                 {
                     printf("\nKolejka pusta");
                 }
                 free(fifo.head);
             }
             if(a==3)
                 return 0;
         }
     }