header.h

#pragma once
#include <iostream>
#include <string>

using namespace std;

struct Stack
{
    int val;
    Stack *prev;
    Stack();
    Stack(int newNum, Stack *newLink = NULL);
};

class StackClass
{
private:
    Stack *top;
public:
    const string typeName = "stack";
    StackClass();
    void push(int newNum);
    void travPrt(void(*print)(Stack*));
    void pop();
    bool isNull();
};

struct Queue
{
    int val;
    Queue *next;
    Queue();
    Queue(int newNum, Queue *nextLink = NULL);
};

class QueueClass
{
private:
    Queue *front;
    Queue *rear;
public:
    const string typeName = "queue";
    QueueClass();
    void append(int newNum);
    void serve();
    bool frontNull();
    void travPrint(void(*print)(Queue*));
};