## Using array to execute the queue structure, Data Structure & Algorithms

Assignment Help:

Q. Using array to execute the queue structure, write down an algorithm/program to

(i) Insert an element in the queue.

(ii) Delete an element from the queue.

Ans.

(i) Algorithm to Insert an element in the given queue.

QINSERT( QUEUE, N, FRONT, REAR, ITEM)

This method inserts an elements ITEM into a queue.

if FRONT =1 and REAR =N or if FRONT = REAR +1 then

write:OVERFLOW, and Return.

2. [Find new value of REAR]

If FRONT : = NULL, then : [QUEUE initially empty]

Set FRONT : = 1 and REAR : = 1, Else if REAR = N then;

Set REAR : = 1

Else:

Set REAR : = REAR + 1 [End of if structure]

3.Set QUEUE [REAR]: = ITEM [This inserts new elements]

4. Return

(ii) Algorithm to erase an element from the Queue

QDELETE (QUEUE, N, FRONT, REAR, ITEM)

This method deletes an element from a Queue and assign it to the variable ITEM.

If  FRONT:= NULL, then write UNDERFLOW and Return

2.  Set ITEM:=QUEUE[FRONT]

3.  [Find new value of FRONT]

If FRONT=REAR, THEN[Queue has only one element to start.]

Set FRONT:=NULL and REAR:=NULL Else  if      FRONT=N then:

Set FRONT:=1

Else:

Set FRONT:=FRONT+1 [End of If structure]

4.  Return.

#### Algorithsm, What are the properties of an algorithsm?

What are the properties of an algorithsm?

#### Explain state space tree, Explain State Space Tree If it is convenient ...

Explain State Space Tree If it is convenient to execute backtracking by constructing a tree of choices being made, the tree is known as a state space tree. Its root indicates a

#### Data type, Data type An implementation of an abstract data type on a...

Data type An implementation of an abstract data type on a computer. Therefore, for instance, Boolean ADT is implemented as the Boolean type in Java, and bool type in C++;

#### Estimate best first search nodes , Given the following search tree, state t...

Given the following search tree, state the order in which the nodes will be searched for breadth first, depth first, hill climbing and best first search, until a solution is reache

#### Determine the disjoint of division method, Determine the Disjoint of divisi...

Determine the Disjoint of division method A polygon is disjoint from the viewport if the x- and y-extents of the polygon do not overlap the viewport anywhere. In this case; reg

#### What do you understand by structured programming, What do you understand by...

What do you understand by structured programming Structured Programming  This term is used for programming design that emphasizes:- (1) Hierarchical design of programmi

#### Graph and BFS, traverse the graph as BFS

traverse the graph as BFS

#### Define spanning tree, Define Spanning Tree A Spanning Tree of a connect...

Define Spanning Tree A Spanning Tree of a connected graph is its linked acyclic sub graph (i.e., a tree) that having all the vertices of the graph.

#### Multiple queue, How to create multiple queue on single array?

How to create multiple queue on single array?

#### Railway reservation system, write an algorithm on railway reservation syste...

write an algorithm on railway reservation system  