//main
#include <iostream>
#include "Node.h"
#include "Kolejka.h"

using namespace std;

int main()
{
    Kolejka k;
    k.push(1);
    k.push(25);
    k.push(77);
    k.printKol();
    k.pop();
    k.printKol();
    return 0;
}

//kolejka.h
#ifndef KOLEJKA_H
#define KOLEJKA_H
#include "Node.h"


class Kolejka
{
    private:
        Node *head, *tail;
    public:
        Kolejka();
        ~Kolejka();
        void push(int info);
        Node* pop();
        void printKol();
        bool isEmpty();
};

#endif // KOLEJKA_H

//kolejka.cpp
#include "Kolejka.h"
#include "Node.h"
#include <iostream>

Kolejka::Kolejka()
{
    head = tail = 0;
}

Kolejka::~Kolejka()
{
    //dtor
}

bool Kolejka::isEmpty(){
    if (head == 0)
        return 1;
    else
        return 0;
}

void Kolejka::push(int el){
    if (isEmpty()){
        Node* tmp = new Node(el);
        head = tmp;
        tail = tmp;
    }
    else{
        Node* tmp = new Node(el);
        tail->setNext(tmp);
        tail=tmp;
    }

}

Node* Kolejka::pop(){
    if (isEmpty()){
        std::cout << "error";
        return 0;
    }
    else{
        Node* tmp = head;
        head = head->getNext();
        return tmp;
    }
}

void Kolejka::printKol(){
    Node* tmp = head;
    while (tmp != 0){
        std::cout << tmp->getInfo() << " ";
        tmp = tmp->getNext();
    }
    std::cout << std::endl;

}

//node.h
#ifndef NODE_H
#define NODE_H


class Node
{
    private:
        int info;
        Node* next;
    public:
        Node();
        ~Node();
        Node(int inf);
        Node* getNext();
        void setNext(Node* nex);
        int getInfo();
        void setInfo(int inf);
};

#endif // NODE_H

//node.cpp
#include "Node.h"

Node::Node()
{
    info = 0;
    next = 0;
}

Node::~Node()
{
    //dtor
}
Node::Node(int inf){
    info = inf;
    next = 0;
}

Node* Node::getNext(){
    return next;
}

void Node::setNext(Node* nex){
    next = nex;
}

int Node::getInfo(){
    return info;
}

void Node::setInfo(int inf){
    info = inf;
}