Stack & Queue using Linked List in Data Structure
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queue
queueumair khan This document describes how to implement a queue using a linked list. It outlines the necessary steps: defining a Node structure with data and next pointers, initializing front and rear pointers to NULL, and implementing functions for enqueue, dequeue, and display. The enqueue function adds a new node to the rear. Dequeue removes the front node. Display traverses the list from front to rear printing the data values.
Lecture 7 data structures and algorithms
Lecture 7 data structures and algorithmsAakash deep Singhal A queue is a first-in, first-out (FIFO) data structure that can be implemented using either a linear array or linked list. Elements are added to the rear of the queue and removed from the front. A priority queue is a collection of elements where each element has a priority and higher priority elements are processed before lower priority ones. A priority queue can be implemented using a one-way linked list where each node stores the element, priority, and link. Elements are deleted from the front of the list and inserted in order of descending priority.
Stacks queues-1220971554378778-9
Stacks queues-1220971554378778-9Getachew Ganfur The document discusses stacks and queues as data structures. Stacks follow LIFO (Last In First Out) and involve push and pop operations on an array or linked list. Queues follow FIFO (First In First Out) and involve insert and delete operations, with insertion at the rear and deletion at the front. The document provides examples of implementing stacks and queues using arrays and linked lists, and describes the basic operations like creation, insertion, deletion, checking for empty/full.
Rana Junaid Rasheed
Rana Junaid RasheedRana junaid Rasheed The document discusses stacks and queues as data structures. Stacks follow LIFO (Last In First Out) and allow insertion and deletion from one end only. Queues follow FIFO (First In First Out) and allow insertion from one end and deletion from the other. Both can be implemented using arrays or linked lists. Common operations on stacks are push and pop, while common operations on queues are insert and delete.
introduction of the Stacks and Queues.pptx
introduction of the Stacks and Queues.pptxkavitashingi123 This presentation provides an in-depth overview of Stacks and Queues, two fundamental data structures used in computer science and programming. The presentation covers key concepts, definitions, and operations for both data structures, including push and pop operations for stacks, and enqueue and dequeue operations for queues.
Key topics include:
The LIFO (Last In, First Out) and FIFO (First In, First Out) principles.
Array-based and linked list-based implementations of stacks and queues.
Real-world applications of stacks (e.g., expression evaluation, undo mechanisms) and queues (e.g., task scheduling, BFS traversal).
Practical examples and visualizations to help understand how stacks and queues work in various algorithms.
Whether you're new to data structures or looking to refresh your knowledge, this presentation will help you grasp the core concepts and applications of stacks and queues in programming and computer science.
Ideal for:
Computer Science students
Aspiring software engineers
Programming enthusiasts
Anyone looking to improve their understanding of data structures and algorithms
Bsc cs ii dfs u-2 linklist,stack,queue
Bsc cs ii dfs u-2 linklist,stack,queueRai University The document discusses different data structures including stacks, queues, linked lists, and their implementations. It defines stacks as LIFO structures that can add and remove items from one end only. Queues are FIFO structures that add to one end and remove from the other. Linked lists store data in nodes that point to the next node. Stacks, queues and linked lists can all be implemented using arrays or by linking nodes. Priority queues and deques are also discussed.
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- 1. Presented BY : Shraddha Malviya “Stack and Queue using Linked List” Roll No. : MCA/25018/18
- 2. Stack A stack is an ordered list with the restriction that element are added or deleted from only one end of list termed top of stack. The other end of the list which lies ‘inactive’ is termed bottom of stack.
- 3. Stack using linked list A linked stack is a linear list of elements commonly implemented as a singly linked list whose start pointer perform the role of the top pointer of stack . c b a top Linked representation of stack
- 4. Stack operation : Push operation- c a top b Linked stack S Push ‘d’ into S cd ab top top Push operation PUSH_LINKSTACK(TOP,ITEM) Call GETNODE(X) DATA(X) = ITEM /*frame node item */ LINK(X) = TOP /* insert into x into stack */ TOP = X /*reset Top pointer */ end PUSH_LINKSTACK.
- 5. Pop operation- c ab Linked stack Stop Pop ‘c’ from S c ab top top Push operation POP_LINKSTACK(TOP,ITEM) if(TOP=0) then call LINKSTACK_EMPTY else { TEMP=TOP; ITEM=DATA(TOP); TOP=LINK(TOP); } Call RETURN (TEMP) end POP_LINKSTACK
- 6. Queue A Queue is a linear list in which all insertion are made at one end of the list known as rear or tail of queue and all deletion are made at the other end known as front or head of the queue . An insertion operation is also referred to as enqueuing a queue and deletion operation is referred to as dequeuing a queue.
- 7. Queue using linked list A linked queue is also linear list of element commonly implemented as a singly linked list but with two pointer ,Front and Rear . The start pointer of the singly linked list plays the role of Front while the pointer to the last node is set to play the role of Rear . a b c front rear Linked representation of queue
- 8. Queue operation : Insert operation-- a b front c rear Insert ‘d into queue’ a b dc rear front rear Insertion operation INSERT_LINKQUEUE(FRONT,REAR, ITEM) Call GETNODE (X); DATA (X) = ITEM; LINK (X) = NIL; if(FRONT = 0) then FRONT = REAR = X; else { LINK (REAR) = X; REAR = X; } end INSERT_LINKQUEUE
- 9. Delete operation-- a b c rear front Delete ‘a’ from queue front a b c rear front Delete operation DELETE_LINKQUEUE (FRONT , ITEM) if(FRONT = 0) then call LINKQUEUE_EMPTY; else { TEMP = FRONT; ITEM= DATA(TEMP); FRONT = LINK(TEMP); } call RETURN (TEMP); end DELETE_LINKQUEUE
- 11. Reference: DATA STRUCTURES AND ALGORITHMS, GAV Book:
- 12. THANKYOU