Priority Queue in C Programming

February 25, 2023

Priority Queue in C Programming 

A priority Queue in C Programming  data structure is a special type of queue in which deletion and insertion perform on the basis of priority of data element.There can be min priority queue and max priority queue.In real word example when a VIP comes for a service he will get the service before the other people standing in a Queue because he has the priority over other people.

Implementation of Queues using Linked List in C

Implementation of Priority Queue in C Programming

Priority Queue can be implemented by three data Structure:-

  • Array
  • Linked List
  • Heap

More About Priority Queue in C Programming

  • Priority Queue is the special case of Queue.
  • In priority queue deletion and insertion base on priority of the data elements
  • In Queue there is priority for each element.
  • There is two types of Priority Queue min priority queue and max priority queue.
  • In min priority queue min number has highest priority and max number has lowest priority.In max priority queue max number has highest priority and min number has lowest priority.
  • Priority Queue can be implemented using Array, Linked list and Heap in C programming language.

Priority Queue operations

  • Enqueue(): Adding a new item to the Queue Data Structure, in other words Enqueue new item to Queue If Queue is full, then it is said to be in an overflow condition.
  • Dequeue(): Delete a item from a Queue, Deletion based on priority, highest priority element deleted first.In other words Dequeue item from Queue If queue is empty then it is said to be in an underflow condition.
  • Print(): Print the data elements of Queue.
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Queues In Data Structures

Circular queue in C

Priority Queue Implementation using Array

Priority Queue using Linked List

Priority Queue Insertion and Deletion

Operations on Priority Queue

There is three operations we can perform on Priority Queue as follows:

  • Enqueue()
  • Dequeue()
  • Print()
  • isEmpty()

1.Enqueue( )

  • When we require to add an element and its priority to the queue we perform Enqueue() operation.
  • Enqueue() operation is synonymous of insertion in a data structure Queue.
Priority Queue in C Programming 3

2.Dequeue()

  • When we require to delete an element and its priority from the queue we perform Dequeue() operation.
  • Dequeue() operation is synonymous of deletion in a data structure Queue.
Priority Queue in C Programming 1

3.Print( )

  • Print() function is use to print the data and priority of data of Queue
Priority Queue in C Programming 2

4.isEmpty( )

  • isEmpty() function is use to check,Queue is empty or not.

Applications of Priority Queue

There is following applications of Priority Queue:

  • Dijktra’s shortest path algorithm.
  • Prim’s Algorithm
  • Data Compression->Huffman Code
  • Heap Sort
  • Operating System: Local Balancing, Interrupt Handling.

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Stacks

Queues

Circular Queues

Priority Queue

  • Application of Priority Queue
  • Priority Queue Example
  • Priority Queue Introduction – C | C++ | Java
  • Priority Queue Implementation using Array – C | C++ | Java
  • Priority Queue using Linked List – C | C++ | Java
  • Priority Queue Insertion and Deletion- C | C++ | Java

Stacks

  • Introduction to Stack in Data Structure
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  • Operations on a Stack
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  • Stack: Infix, Prefix and Postfix conversions
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  • Representation of a Stack as an Array. –
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  • Representation of a Stack as a Linked List. –
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  • Infix to Postfix Conversion –
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  • Infix to prefix conversion in –
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  • Postfix to Prefix Conversion in –
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Queues

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  • Queues Program in C and implementation
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  • Implementation of Queues using Arrays | C Program
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  • Types of Queues in Data Structure
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  • Application of Queue Data Structure
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  • Deletion (Removal) in Queues Program(Dequeuing) –
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Circular Queues

Priority Queue

  • Application of Priority Queue
  • Priority Queue Example
  • Priority Queue Introduction –
    C | C++ | Java
  • Priority Queue Implementation using Array –
    C | C++ | Java
  • Priority Queue using Linked List –
    C | C++ | Java
  • Priority Queue Insertion and Deletion-
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