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

struct car{
    double data;
    int id;
    struct car *next;
};
struct fifo_pointers{
    struct car *first, *last;
}kol;
void push(struct fifo_pointers *kol, double data, int id){
    struct car *new_node=(struct car*)malloc(sizeof(struct car));
    if(new_node){
        new_node->data=data;
        new_node->id=id;
        new_node->next=NULL;
        if(kol->first==NULL)
            kol->first=kol->last=new_node;
        else{
            kol->last->next=new_node;
        }
    }
    else puts("Nowy element nie zostal utworzony!");
}
void pop_at_front(struct fifo_pointers *kol){
    if(kol->first){
        struct car *tmp=kol->first->next;
        free(kol->first);
        kol->first=tmp;
        if(tmp==NULL)
            kol->last=NULL;
    }
    else puts("Kolejka nie istnieje");
}
void wyswietl(struct fifo_pointers kol){
    while(kol.first){
        printf("ID: %d\n", kol.first->id);
        printf("Data: %.1f\n", kol.first->data);
        kol.first=kol.first->next;

    }
    puts(" ");
}
int main()
{
    push(&kol, 10.2, 23);
    wyswietl(kol);
    pop_at_front(&kol);
    return 0;
}