Write a program to implement queue using linked list in c++

History[ edit ] Stacks entered the computer science literature inwhen Alan M. Turing used the terms "bury" and "unbury" as a means of calling and returning from subroutines. Klaus Samelson and Friedrich L. Bauer of Technical University Munich proposed the idea in and filed a patent in[4] and in March Bauer received the Computer Pioneer Award for the invention of the stack principle.

Write a program to implement queue using linked list in c++

There are some fairly heady discussions, so I'd like to take the opportunity to break things down a bit for understanding why an interface is useful. When I first started getting exposed to interfaces, I too was confused about their relevance.

I didn't understand why you needed them. If we're using a language like Java or Cwe already have inheritance and I viewed interfaces as a weaker form of inheritance and thought, "why bother? For example -- say you have a SIM game and have the following classes: But, you could say they are both annoying.

Let's say our game needs to have some sort of random thing that annoys the game player when they eat dinner.

C.hierclass: Designing classes in a hierarchy:

This could be a HouseFly or a Telemarketer or both -- but how do you allow for both with a single function? And how do you ask each different type of object to "do their annoying thing" in the same way?

The key to realize is that both a Telemarketer and HouseFly share a common loosely interpreted behavior even though they are nothing alike in terms of modeling them.

So, let's make an interface that both can implement: And they do not need to derive from the same base class and share common inherent characteristics -- they simply need to satisfy the contract of IPest -- that contract is simple. You just have to BeAnnoying. In this regard, we can model the following: This means that in our little world, a member of the pests array could actually be a Telemarketer object or a HouseFly object.

The ServeDinner method is called when dinner is served and our people in the dining room are supposed to eat.

In our little game, that's when our pests do their work -- each pest is instructed to be annoying by way of the IPest interface. In this way, we can easily have both Telemarketers and HouseFlys be annoying in each of their own ways -- we care only that we have something in the DiningRoom object that is a pest, we don't really care what it is and they could have nothing in common with other.

This very contrived pseudo-code example that dragged on a lot longer than I anticipated is simply meant to illustrate the kind of thing that finally turned the light on for me in terms of when we might use an interface. I apologize in advance for the silliness of the example, but hope that it helps in your understanding.

And, to be sure, the other posted answers you've received here really cover the gamut of the use of interfaces today in design patterns and development methodologies.Several of the C++ Standard Library container types have push_back and pop_back operations with LIFO semantics; additionally, the stack template class adapts existing containers to provide a restricted API with only push/pop operations.

PHP has an SplStack class. Java's library contains a Stack class that is a specialization of yunusemremert.coming is an example program in Java language, using.

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LinkedList Programming Interview Questions 14) How do you find middle element of a linked list in single pass? To answer this programming question I would say you start with simple solution on which you traverse the LinkedList until you find the tail of linked list where it points to null to find the length of linked list and then reiterating till middle.

In the previous post, we introduced Queue and discussed array implementation.. In this post, linked list implementation is discussed. The following two main operations must be implemented efficiently. In a Queue data structure, we maintain two pointers, front and yunusemremert.com front points the first item of queue and rear points to last item..

write a program to implement queue using linked list in c++

enQueue() This operation adds a new node after rear and. Linked lists are among the simplest and most common data structures. They can be used to implement several other common abstract data types, including lists, stacks, queues, associative arrays, and S-expressions, though it is not uncommon to implement those data structures directly without using a linked list as the basis..

The principal benefit of a linked list over a conventional array is. Stack and Queue Implementation of Linked List in C++ (A) Stack Implementation of Linked list.

Algorithm. 1. Queue Implementation of Linked List. Algorithm. 1. Declare and initialize necessary variables such as struct node *front, *rear etc 2. For enqueue operation. Several of the C++ Standard Library container types have push_back and pop_back operations with LIFO semantics; additionally, the stack template class adapts existing containers to provide a restricted API with only push/pop operations.

PHP has an SplStack class. Java's library contains a Stack class that is a specialization of yunusemremert.coming is an example program in Java language, using.

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