CS101-07 Queues - CJD 07 Queues 07 Queues CJD Queues Queue...

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CJD 07 Queues 07 Queues
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CJD Queues Queue – a linear data structure that can be accessed from both its ends. One end, the front (or head ), is for retrieving data. The other end, the rear (or tail ), is for storing data. Principle : FIFO (First-In First-Out) Example : Waiting Lines Front Juan Kiko Pedro Kulas Rear Queue :
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CJD Some Applications of Queues Waiting Lines and Assembly Lines Print Jobs I/O requests – mouse/key clicks, file access Other Operating System / Run-Time Environments requests (ex. CPU requests) Simulations (Queueing Theory) Trees and Graphs Exploration – future lesson
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CJD Queue Operations clear () – clears the queue isEmpty () – checks if the queue is empty isFull () – checks if the queue is full enqueue (el) – Puts element el on rear of queue dequeue () – removes and returns the element from front of the queue front () – returns the first element of the queue without removing it.
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CJD Example: A * * B C D * - E * F queue<Character> q // create instance of stack
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