And as elements are added to the queue (insertion) the end variable's value is increased. Array Implementation of Queue in C/C++. showfront(): To show the element at front. Thus making it a better pick than the normal queue. Similar to the stack, we will implement the queue using a linked list as well as with an array. Here you can learn C, C++, Java, Python, Android Development, PHP, SQL, JavaScript, .Net, etc. If it is, then print the output as “Queue Underflow”. the element that is inserted first is also deleted first. We can implement a deque in C++ using arrays as well as a linked list. We will use ‘size’ to store the current size of the queue. Circular Queue Implementation using an array – There are several efficient implementations of FIFO queues. I will explain the logic behind basic operations performed on queue. Just define a one dimensional array of specific size and insert or delete the values into that array by using FIFO (First In First Out) principle with the help of variables 'front' and ' rear '. max length of an array. C++ Arrays ; Queue Basics; Problem Definition. The value of the front variable is 5, therefore, we can not reinsert the values in the place of already deleted element before the position of front. 5. Queue operations work as follows: 1. Similar to a queue of day to day life, in Computer Science also, a new element enters a queue at the last (tail of the queue) and removal of an element occurs from the front (head of the queue). Unlike linear queues which faces the problem of reduction in available size for […] Similar to a queue of day to day life, in Computer Science also, a new element enters a queue at the last (tail of the queue) and removal of an element occurs from the front (head of the queue). The order is First In First Out (FIFO). The person who comes first gets places first. Array implementation Of Queue. The people who are treated their names are removed from the list. With a fixed sized array you can use a rotary buffer where you need only keep offset and size as well as the array of values, you don't need a node struct as you keep values in … 3. If the queue is empty then intialize front and rear to 0. You can have c program to implement queue using array, using stack and using linked list. The elements are inserted at the front of the queue and removed from the rear of the queue. A queue is a Non-Primitive Linear Data Structure so just like an Array. If these two variables are equal, an overflow condition is reported back and new element cannot be inserted. Then we got two display functions for both the different type types of a queue. Implementation of Deque using Array. The value of the end can increase up to n i.e. The above implementation shows the queue represented as an array. Write a program to implement a queue using an array. Similar to the stack, we will implement the queue using a linked list as well as with an array. When we implement Circular Queue using arrays we use mod operator for indexing in Queue. Therefore, it is important to determine the size of the queue prior to the program run. What is an Array ? In other words, the least recently added element is removed first in a queue. The Queue is implemented without any functions and directly written with switch case. We also define the enqueue and dequeue operations as well as the isFull and isEmpty operations. Prev; Next; Get Latest Articles. In the linear Array representation of a Queue, two variables FRONT and REAR are maintained to store the indexes of the first and last elements respectively. The implementation of queue data structure using array is very simple. When initializing the queue, we set the value of FRONT and REARto -1. One of the common ways to implement a queue is using arrays. No.1 and most visited website for Placements in India. With a fixed sized array you can use a rotary buffer where you need only keep offset and size as well as the array of values, you don't need a node struct as you keep values in … Implementation of Queue Using Array In C++: Array, Stack or Linked List can be used to implement queues in C++. Otherwise print the first element of the array queue_array[] and decrement the variable front by 1. Now, initially, the array is empty i.e. Let us consider a simple scenario to help you get a clear picture of queues. A (bounded) queue can be easily implemented using an array using a five-element structure: structure stack: item : array maxsize : integer front : integer rear : integer size : integer Since fixed length arrays have limited capacity, we need to convert the array into a closed circle. Hey man, I suggested to link … Arrays are basically used for Static Implementation and Linked Lists are used for Dynamic Implementation. i.e. Two pointers called FRONT and REARare used to keep track of the first and last elements in the queue. A queue is an abstract data structure that contains a collection of elements. It follows the order of First In First Out (FIFO).. Implementation of Queue using Array in C. Author: RajaSekhar. Queue Using Array in C++. Front and rear variables point to the position from where insertions and deletions are performed in a queue. Limitation of the regular Queue. Circular Queue works by the process of circular increment i.e. class Queue {private: int A[MAX_SIZE]; int front, rear; public: // Constructor - set front and rear as -1. program for add 2 array elements and store in 3rd array using loop spliting Simple Array, 2D Array, Multidimensional Array Program to implement a circular queue as a linked list Steps for Implementing Circular Queue using Array in C++ . You can easily set a new password. Real-life example of queues are above which will use concept of queue. If not, then it will say Queue is Empty. A program that implements the queue using an array is given as follows − Example In order to better understand the concept of queues in C, we can say that it follows the rule of “First Come First Serve”. A queue is a linear data structure that serves as a container of objects that are inserted & removed according to the FIFO (first-in first-out) principle.. Queue has three main operations: enqueue, dequeue and peek.We have discussed about these operations in previous post and also covered C implementation of queue data structure using an array and linked list. And we have to insert the element 8 in the queue, so … isempty(): To check if queue is empty. max length of an array. It is a homogenous (similar ) collection of elements in which new elements are inserted at one end Called the Rear end, and the existing elements are deleted from the other end called the Front end. The Third function will simply print all the elements of the Queue if exist. A C program is given below which shows how various operations can be performed on a double ended queue represented by circular array. A C program is given below which shows how various operations can be performed on a double ended queue represented by circular array. There are two types of double-ended queues they are input restricted double-ended queue and output restricted double-ended queue. The Queue can hold only 5 items, for changing the capacity edit the second line. If it is, then print the output as “Queue Underflow”. 1. fsociety123 in your code for array implementation as queue there is a mistake. This Program For Queue in Data Structures is based on Static Arrays. Given below is the Java implementation of the queue data structure. As we already discussed, arrays support the static memory allocation of the data elements of the queue. Insertion. And as elements are added to the queue (insertion) the end variable's value is increased. You can have c program to implement queue using array, using stack and using linked list. enqueue(): Insertion of new element in queue. How Circular Queue Works. In data structures, double ended queue linear data structure in which both insertion and deletion are performed at both the ends. An array is used to store a collection of data, but it is often more useful to think of an array as a collection of variables of the same type. You are visiting a doctor for a check-up. The Size of array is 5 by default, to change, edit the second line of code. C++ Program to Implement Queue using Array February 17, 2020 January 7, 2020 by Bilal Tahir Khan Queue using array in C++ :Hi Programmer Hope You are Fine today we Share Some code About Array.Like Stack, Queue is a linear structure which follows a particular order in which the operations are performed. } // namespace queue_using_array} // namespace data_structures /* * * @brief Main function * @details * Allows the user to add and delete values from the queue. Step 1 - Include all the header files which are used in the program and define a constant 'SIZE' with specific value. Enqueue (Insertion) Dequeue (Removal) How to create queue data structure using array. Priority Queue Implementation using Array: Queue is also an abstract data type or a linear data structure, just like stack data structure, in which the first element is inserted from one end called the REAR(also called tail), and the removal of exist Easy code for Queue operations using c. Refer Stack implementation using arrays in C. Author and Editor for programming9, he is a passionate teacher and blogger. Queue implements the FIFO mechanism i.e. Which is why Queues are called as First in First out (FIFO) system or Last in Last out system(LILO), The following are terminologies used in Queue Array implementation –, The simple implementation of queues faces a unique problem. In this lecture I have described array based implementation of queue data structure. Circular queues are extension of linear queues where the max size of queue is always available for insertion. C++ Program to Implement Queue using Array. As the array elements are fed, the REAR moves ahead, positioning itself on the index where the next element will be added, while the FRONT remains at the first index. If we simply increment front and rear indices, then there may be problems, the front may reach the end of the array. Just define a one dimensional array of specific size and insert or delete the values into that array by using FIFO (First In First Out) principle with the help of variables 'front' and 'rear'. If not, then it will say Queue is Empty. In contrast to a stack, a queue is nothing but a linear data structure that follows the FIFO rule (First In First Out). Here’s simple Program to implement circular queue using arrays in C Programming Language. O… C Program to add, delete and display queue element using an array. Learn More about Structures in C Language Suppose you … Insertion will be done at rear side and deletion will be performed at front side. To insert an element, REAR is compared with MAX (size of array storing queue-1). There are two basic operations that we generally perform on queue. The queue functions basically include: 2.1 Insertion. We will use three pointers to implement the queue using an array, ‘size’, ‘front’ and ‘rear’. In this tutorial, You are going to learn about Queue data structure and their implementation using an array in C, C++ & Java. Circular Queue is also called ring Buffer. 1. In the linear Array representation of a Queue, two variables FRONT and REAR are maintained to store the indexes of the first and last elements respectively. In this post I will explain queue implementation using array in C language. Insert the element. CognizantMindTreeVMwareCapGeminiDeloitteWipro, MicrosoftTCS InfosysOracleHCLTCS NinjaIBM, CoCubes DashboardeLitmus DashboardHirePro DashboardMeritTrac DashboardMettl DashboardDevSquare Dashboard, facebookTwitter Two variables are used to implement queue, i.e “rear” and “front”. Whenever we do simultaneous enqueue or dequeue in the queue. C Program to Implement Queues using Arrays #include #define SIZE 5 //Basic value initialisation int queue[SIZE], front = -1, rear = -1; //Function created to handle enqueue void enqueue(int item){if(rear == SIZE-1){printf("Can't enqueue as the queue is full\n");} else{//The first element condition if(front == -1){front = 0;} rear = rear + 1; If you're using realloc the address can change so you'll want your next, prev, head and tail to use indices. If these two variables are equal, an overflow condition is reported back and new element cannot be inserted. In the function delete(), firstly check if the queue is empty. when we try to increment any variable and we reach the end of the queue, we start from the beginning of the queue by modulo division with the queue size. Queue Data Structure Question. As the array elements are fed, the REAR moves ahead, positioning itself on the index where the next element will be added, while the FRONT remains at the first index. If you're using realloc the address can change so you'll want your next, prev, head and tail to use indices. Now, some of the implementation of queue operations are as follows: Implementation of Queue Using Array In C++: Array, Stack or Linked List can be used to implement queues in C++. Easy. Just type following details and we will send you a link to reset your password. C program to implement circular queue using array For implementing queue, we need to keep track of two indices, front and rear. 4. Arrays a kind of data structure that can store a fixed-size sequential collection of elements of the same type. Circular queue avoids the wastage of space in a regular queue implementation using arrays. both front=rear=-1 then while deQueue() gives empty queue but the print function right after it prints the value 0. G+Youtube InstagramLinkedinTelegram, [email protected]+91-8448440710Text Us on Facebook. Easy code for Queue operations using c. #include #define n 5 int main() { int queue[n],ch=1,front=0,rear=0,i,j=1,x=n; printf("Queue using Array"); printf("\n1.Insertion \n2.Deletion \n3.Display \n4. There are many people at the clinic. Element rear is the index upto which the elements are stored in the array and front is the index of the first element of the array. 2. We enqueue an item at the rear and dequeue an item from the front. C Program to Search an Array Element using BINARY SEARCH. // A class representing a queue class Queue { int front, rear, size; int max_size; int myqueue[]; public Queue(int … There are two variables i.e. 4. Previous: Queue in C; Making a queue using linked list in C; The previous article was all about introducing you to the concepts of a queue. The first person to enter the queue is served by the air hostess at ticket counter first, the last person to enter is served last. Implementation of Queue operations using c programming. The Third function will simply print all the elements of the Queue if exist. Insertion is done from the back (the rear end) and deletion is done from the front. C Program to Find Nth Fibonacci Number Using Recursion, C Program to Copy a String with out using strcpy() Built in Function, C Program to Find Length of a String Using STRLEN(), Simulate Bankers Algorithm for Deadlock Avoidance Using C, C Program to Swap Two Numbers without using Third Variable, C Program to Find Sum of 5 Subjects and Percentage, C Program to Print Addresses of Variables, C program to find Sum of Digits of a Positive Integer Number, C Program to Find an Element Using Linear Search. In the above figure, a queue of size 10 having 3 elements, is shown. dequeue(): Removal of element at front from queue. Let us explore the array implementation technique. That much space of the array is wasted and can not be used in the future (for this queue). All arrays consist of contiguous memory locations. This Array Queue code in C Programming is Static Implementation. In queues, the first element entered into the array is the first element to be removed from the array. Introduction: Queue using array. Index « Previous Next ». First we will … Apart from this, the Standard Template Library (STL) has a class “deque” which implements all the functions for this data structure. This is a queue and follows a first in first out method as the first person to enter his name in the list gets treated first. front and rear, that are implemented in the case of every queue. Otherwise print the first element of the array queue_array[] and decrement the variable front by 1. Here’s simple Program to Implement Queue using an Array in C Programming Language. both top and end are at 0 indexes of the array. Let us explore the array implementation technique. To implement a circular queue data structure using an array, we first perform the following steps before we implement actual operations. If you are familiar with the basics, continue reading. The implementation of queue data structure using array is very simple. In my previous posts, I have explained Stack and Linked List data structure. We can easily represent queue by using linear arrays. The value of the end can increase up to n i.e. //Only happens when the last element was dequeued, "\nThe queue after enqueue & dequeue ops looks like :", Another way of solving this is either by circular queues or tweak in implementation as given in the code below -, //imagine scenario where enqueue is happening at last element of queue, //if some dequeue has happened then 0th element or others may be free, //using % operation we can now enter at 0th or others positions here, "%d Successfully Enqueued at array pos:%d\n", "\nNo elements, queue is empty can't dequeue", "\n%d Successfully dequeued & changed front value which is: at pos:%d\n", //0th pos now empty, //front: a[1], rear: a[3], //1st pos now empty, //front: a[2], rear: a[3], //note the explanation in the above image starts from here. Queue using array in C++:Hi Programmer Hope You are Fine today we Share Some code About Array.Like Stack, Queue is a linear structure which follows a particular order in which the operations are performed. C program to implement circular queue using array When there is no element in the queue i.e. C Program to Find Area and Circumference of a circle. Implementation of Stack using Arrays in C++ Stack using Arrays. Insert an element in a Queue using an Array. Queue program in C++ using Array and STL Abhiram Reddy; Oct 3, 2020 Nov 21, 2020; 3 min read; The Queue is one of the most important Linear Data Structure, Queue program follows the FIFO rule i.e First In First Out. Insertion will be done at rear side and deletion will be performed at front side. However, queues can also be implemented using arrays, while this is not a sensical way to implement queues and structures must be used to implement in C. But let us look at the program, You can think of queues as a queue of people at airport ticket counter. Implementation of Circular Queues using Array in C In this post we will learn on how we can implement circular queues purely using arrays. Example: int queue[CAPACITY]; The above statement creates a queue, where CAPACITY is … Before you learn about how to implement a queue, be familiar with the concept of arrays and queue. Author and Editor for programming9, he is a passionate teacher and blogger. Two variables are used to implement queue, i.e “rear” and “front”. Enqueue Dequeue Is Empty (check if queue is empty) Is … In the function delete(), firstly check if the queue is empty. In array implementation of queue, we create an array queue of size n with two variables top and end. This can be solved once all the elements are dequeued and values of front and rear are again put back to -1. We specify the max_size for the array. As you know all the elements of a stack are of the same data type, like, Int, Float, Char and so on. Real-life example of queues are above which will use concept of queue. 5. The Queue is implemented without any functions and directly written with switch case. Easy. This is how a queue … Circular Queue using Array in C++ programming is the better way to implement Queue instead of using simple queue because in simple Queue there is wastage of memory where as in Circular Queue there is no wastage. // We are assuming that for an empty Queue, both front and rear will be -1. Suppose we have this queue of size 5. The array implementation of the deque has been given below. Learn How To Implement of Queue using Array in C Programming. In this article, we will code up a queue and all its functions using an array. The lowest address corresponds to the first element and the highest address to the last element. both top and end are at 0 indexes of the array. rear = 5%5 = 0, thus, a[0] = 12; //2nd pos now empty, front: a[3], rear: a[1], AMCAT vs CoCubes vs eLitmus vs TCS iON CCQT, Companies hiring from AMCAT, CoCubes, eLitmus. Else we decrement front and insert the element. so implementation of the stack using Arrays in C++ is very easy. Initially, the value of front and queue is -1 which represents an empty queue. To use an array to implement a queue, you use a 2 dimensional array, where you have one or more columns being the element data or pointer to the element data, and a column for the next element index number. A specific element in an array is accessed by an index. ** // Creating a class named Queue. In this post I will explain queue implementation using array in C language. ... 5 thoughts on “ Double Ended Queue (Dequeue) in C ” Fede February 28, 2014. Find code solutions to questions for lab practicals and assignments. Operations On A Circular Queue. The Queue can hold only 5 items, for changing the capacity edit the second line. Deciding the array … We help students to prepare for placements with the best study material, online classes, Sectional Statistics for better focus and Success stories & tips by Toppers on PrepInsta. To insert an element, REAR is compared with MAX (size of array storing queue-1). Now, initially, the array is empty i.e. Example: int queue[CAPACITY]; /* Queue - Circular Array implementation in C++*/ **#include. By clicking on the Verfiy button, you agree to Prepinsta's Terms & Conditions. In the function display(), using for loop print all the elements of the array … C Program for Implementation of Circular Queue Using Array - The Crazy Programmer Skip to content A lady is entering the names of all the people in a file. //rear = (rear + 1)%maxCapacity; a[rear] = data; //rear = (4 + 1)%maxCapacity; i.e. To use an array to implement a queue, you use a 2 dimensional array, where you have one or more columns being the element data or pointer to the element data, and a column for the next element index number. Enqueue (Insertion) Dequeue (Removal) How to create queue data structure using array. Since we are using circular array, we have to keep in mind that if front is equal to 0 then instead of decreasing it by 1 we make it equal to SIZE-1. Enqueue- adding an element in the queue if there is space in the queue. Implementation of Queue operations using c programming. As you can see in the above image, after a bit of enqueuing and dequeuing, the size of the queue has been reduced. Generally, we use structures with supporting arrays to implement queues. Write a program to implement following operations with the help of circular queue in an array. The indexes 0 and 1 can only be used after the queue is reset when all the elements have been dequeued. I will explain the logic behind basic operations performed on queue. Insert the element. A queue in C is basically a linear data structure to store and manipulate the data elements. The queue implemented using array stores only fixed number of data values. Both will point to the first element. As it’s a double-ended queue we have used circular arrays for implementation. To implement a queue using array, create an array arr of size n and take two variables front and rear both of which will be initialized to 0 which means the queue is currently empty. Contact UsAbout UsRefund PolicyPrivacy PolicyServices DisclaimerTerms and Conditions, Accenture What is Queue ? Don't worry! Queue is also an abstract data type or a linear data structure, in which the first element is inserted from one end called REAR, and the deletion of existing element takes place from the other end called as FRONT. The queue implemented using array stores only fixed number of data values. using namespace std; #define MAX_SIZE 101 //maximum size of the array that will store Queue. The Queue C Program can be either executed through Arrays or Linked Lists. * Also allows user to display values in the queue. ‘front’ and ‘rear’ will simply store the indices of the front and rear elements respectively. There are two basic operations that we generally perform on queue. Online C Queue programs for computer science and information technology students pursuing BE, BTech, MCA, MTech, MCS, MSc, BCA, BSc. Insert an element in a Queue using an Array. In this article, we are going to learn how to create an input and output restricted Deque with the help of array in the data structure? Here is source code of the C Program to Implement Queue using an Array. Submitted by Manu Jemini, on December 19, 2017 This differs from the queue abstract data type or First-In-First-Out List (FIFO), where elements can only be added to one end and removed from the other. When the doctor is free, he calls the first patient inside. 2. We have following functions in queue . Circular Queue In C. A circular queue solved the limitations of the normal queue. In the function display(), using for loop print all the elements of the array … In array implementation of queue, we create an array queue of size n with two variables top and end. It also follows the first come first serve algorithm. Fifo ) we also define the enqueue and dequeue an item at rear... An item from the array are implemented in the case of every queue elements... And queue in c using array not be used in the function delete ( ), check... Out ( FIFO ) the end variable 's value is increased steps for implementing queue, first! To 0 and define a constant 'SIZE ' with specific value element can be. The least recently added element is removed first in first Out ( FIFO ) enqueue or dequeue the! And deletions are performed in a queue and removed from the list files which are used to queues. Your password are assuming that for an empty queue but the print function after! You are familiar with the concept of arrays and queue is empty ; a queue, front! In C++ to find Area and Circumference of a circle queue implementation using array C.. The enqueue and dequeue an item at the front purely using arrays the list deletion... Static memory allocation of the front are again put back to -1 here source! Calls the first element of the queue is empty i.e we use operator..., initially, the front of the common ways to implement a queue and output restricted double-ended queue we used. End of the stack, we create an array element using BINARY.! To reset your password and “ front ” position from where insertions and deletions are performed in regular. This array queue of size 10 having 3 elements, is shown you a. Constant 'SIZE ' with specific value decrement the variable front by queue in c using array deleted first hold only 5 items, changing. Basics, continue reading put back to -1 / * queue - circular implementation! The different type types of a queue, we use mod operator for indexing queue. Pick than the normal queue isEmpty operations for changing the capacity edit the second line code... Rear are again put back to -1 which both insertion and queue in c using array are performed in a.! Basics, continue reading both insertion and deletion will be -1 a circle of new element an. Queue implementation using array is very easy to implement of queue ' with specific value ] ; queue. The function delete ( ) gives empty queue constant 'SIZE ' with specific value website for Placements India. Element can not be inserted in queue as with an array “ rear ” and “ front ” is. Simultaneous enqueue or dequeue in the queue can hold only 5 items, for changing the edit! Front of the data elements of the array queue_array [ ] and decrement the variable front by 1 queue output. In a queue for programming9, he is a Non-Primitive linear data structure size having. For Static implementation a deque in C++ * / * queue - circular array as! ( the rear of the normal queue on “ Double Ended queue ( queue in c using array ) in C language. Use ‘ size ’ to store the current size of array storing queue-1 ) an data... Implement following operations with the concept of queue data structure so just like an array use indices just like array... Practicals and assignments elements respectively queue in c using array that is inserted first is also deleted first thus it. Just type following details and we will use concept of queue using an array queue code C. The highest address to the first element and the highest address to the,. Editor for programming9, he is a passionate teacher and blogger lecture I have stack... Implement the queue the concept of arrays and queue questions for lab practicals and.... Much space of the normal queue Author and Editor for programming9, he a! Element can not be inserted size of queue data structure std ; # MAX_SIZE... This can be solved once all the header files which are used for Static implementation and list... Avoids the wastage of space in the queue C Program to implement queues by,. Right after it prints the value queue in c using array front and rear, that are implemented in the queue data so. Shows the queue queue we have used circular arrays for implementation with specific value insertions and deletions are at! Implementation in C++ learn on How we can implement circular queue using array in C. Author RajaSekhar. Address can change so you 'll want your next, prev, head and tail to use.! Simple scenario to help you get a clear picture of queues or dequeue in the Program run may reach end! Queue implementation using arrays in C language that much space of the has! Array that will store queue structure so just like an array element using BINARY Search reported back and element! Will be performed at front side print function right after it prints the value of the front rear! Any functions and directly written with switch case above implementation shows the queue using array in is... Represented as an array queue code in C Programming with specific value of two indices, then it say! These two variables are used in the case of every queue with switch case code in in... Files which are used to implement of queue using array in C ” Fede February,. The C Program can be either executed through arrays or Linked list following steps before implement. Queue data structure rear indices, front and rear will be performed at from... Consider a simple scenario to help you get a clear picture of queues items, for the. This Program for queue in C ” Fede February 28, 2014 are! Print the first element to be removed from the front may reach the end can increase up to i.e! Right after it prints the value of front and queue is using arrays limitations the... Stack or Linked list as well as the isFull and isEmpty operations will say queue is always available for.. Front from queue these two variables are used to implement a queue is empty then intialize front rear. But the print function right after it prints the value of front and.! The case of every queue if the queue data structure in which both and... Rear end ) and deletion is done from the front the C Program to implement queue. If there is space in the future ( for this queue ) both insertion and deletion will be -1 we. A Program to implement a queue which both insertion and deletion are in!, prev, head and tail to use indices variable 's value is increased keep of! Will simply store the current size of array storing queue-1 ) there is in. The people who are treated their names are removed from the rear the. Deleted first in other words, the array is wasted and can not be inserted this array queue code C... As we already discussed, arrays support the Static memory allocation of the data.! From queue of space in the function delete ( ), firstly check if the queue insertion. * # Include to implement of queue using array is the Java implementation of the type. Will say queue is empty then intialize front and rear from the front may the! Element entered into the array is accessed by an index using realloc the address can change you. Be removed from the array implementation in C++: array, stack or Linked are! C++ using arrays for lab practicals and assignments is no element in an array be either executed through or! Free, he calls the first element of the array that will store.! Use structures with supporting arrays to implement circular queue using a Linked list can be executed. ’ and ‘ rear ’ will simply store the current size of the common ways to implement,... Rear side and deletion will be done at rear side and deletion are performed at from! On Static arrays any functions and directly written with switch case of two indices front! Like an array – there are two basic operations performed on queue front=rear=-1... Structures is based on Static arrays – there are two types of a queue 0... Of space in a queue using a Linked list ) gives empty queue but print. This article, we set the value of front and REARto -1 to,.

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