Method to add an element in circular queue, Data Structure & Algorithms

Assignment Help:

Q. Let us consider a queue is housed in an array in circular fashion or trend. It is required to add new items to the queue. Write down a method ENQ to achieve this also check whether the queue is full. Write down another procedure DQ to delete an element after checking queue empty status.  

Ans.

The Method To Add an element in Circular Queue

# define  MAXQUEUE 100 struct queue{

int items[MAXQUEUE];

int front, rear;

}

struct queue q;

q.front=q.rear=MAXQUEUE -1;

void ENQ(struct queue *pq, int x)

{

/* make room for new element*/

if(pq ->rear = MAXQUEUE - 1)

pq-> rear = 0;

else

(pq->rear)++;

/* check for overflow */

if(pq ->rear==pq->front)

{

printf("queue overflow);

exit(1);

}

pq->items[pq->rear]=x;

return;

}/* end of ENQ*/

A Method to Delete an element from Circular Queue

int DQ(struct queue *pq)

{

if(pq-> rear == pq-> front)

{

printf("queue underflow");

exit(1);

}/*end if*/

if(pq->front = = MAXQUEUE-1)

pq->front=0;

else

(pq->front)++;

return(pq->items[pq->front]);

}/*end DQ*/


Related Discussions:- Method to add an element in circular queue

State the example of pre- and post-conditions, State the example of pre- an...

State the example of pre- and post-conditions Suppose that function f(x) should have a non-zero argument and return a positive value. We can document these pre- and post-condit

Which sorting algorithms not have running time of o (n2), Which sorting al...

Which sorting algorithms does not have a worst case running time of  O (n 2 ) ? Merge sort

Perform breadth -first search, You are given two jugs, a 4-gallon one and a...

You are given two jugs, a 4-gallon one and a 3-gallon one. Neither has any measuring marker on it. There is a tap that can be used to fill the jugs with water. How can you get exac

Explain the scan-line algorithm, Explain the Scan-Line Algorithm This i...

Explain the Scan-Line Algorithm This image-space method for removing hidden surfaces is an extension of the scan-line algorithm for filling polygon interiors. Instead of fillin

Search on a hashed file, Write a program to simulate searching over a hashe...

Write a program to simulate searching over a hashed file, with different assumptions for the sizeof file pages.Write a program to perform equality search operations on the hashed f

Darw a flowchart for inputs number of hours of sunshine, This algorithm inp...

This algorithm inputs number of hours of sunshine recorded every day for a week (7 days). Output is the highest value for hours of sunshine and average (mean) value for numbers of

Create accessors for this data structure, Create a Money data structure tha...

Create a Money data structure that is made up of amount and currency. (a) Write a constructor for this data structure (b) Create accessors for this data structure (c) Writ

FIRST function in the compiler construction, I need a recursive algorithm t...

I need a recursive algorithm to implement the FIRST function to any grammar

Queue be represented by circular linked list, Q. Can a Queue be represented...

Q. Can a Queue be represented by circular linked list with only one pointer pointing to the tail of the queue? Substantiate your answer using an example. A n s . Yes a

Need it urgently, Write an assembly program to separate the number of posit...

Write an assembly program to separate the number of positive numbers and negative numbers from a given series of signed numbers.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd