Lecture9-2 - DataStructures CSCI 132 Spring 2012 Lecture 9...

Info icon This preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Data Structures   CSCI 132, Spring 2012 Lecture 9 Queue Applications
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 The Queue Specification typedef int Queue_entry; const int maxqueue =10 ; public: Queue(); Queue(int init_count); bool empty()const; Error_code serve(); Error_code retrieve(Queue_entry &item) const; Error_code append(const Queue_entry &item); protected: int count, front, rear; Queue_entry entry [maxqueue ]; }; Queue (int init_ct) { count = init_ct; front = 0; if (init_ct == 0) rear = maxqueue - 1; else rear = front + init_ct -1; } //but no values filled in
Image of page 2
3 An extended queue class class Extended_queue : public Queue { public: Extended_queue(); //constructor Extended_queue(int init_count); //Another constructor bool full()const; //return true if queue is full int size() const; //return number of items in queue void clear(); //make queue empty Error_code serve_and_retrieve(Queue_entry &item); //return // value at front of queue and delete the item from the queue private: bool isFull; };
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
4 Constructor Rules for the Derived Class At run time, the base class constructor is implicitly called first , before the body of the derived class’s constructor executes.
Image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern