// carqueue.h
// ----------------------------------------------------------------------
// 
// CSE 143
// Homework 4
// http://www.cs.washington.edu/education/courses/143/00su/homework/
// 21 Jul 2000, Ken Yasuhara
// 23 Jul 2000, removed isFull() decl., Ken Yasuhara


#ifndef _CARQUEUE_H_
#define _CARQUEUE_H_


#include "car.h"


class CarQueue {
public:
  CarQueue();

  int getSize() const;
  bool isEmpty() const;

  // fails assertion if queue is full
  void enqueue(Car *carPtr);

  // returns NULL if queue is empty
  Car *dequeue();  

  // returns NULL if index is invalid
  Car *getItemAt(const int index) const;

  // useful for debugging
  void print() const;

private:


};


#endif // _CARQUEUE_H_