Enqueue javascript algorightm how to#
Enqueue javascript algorightm full#

You can try code provided above in our LMC simulator as it does support indirect addressing:ġ,1 – 1,2 – 1,3 – 2 – 1,4 – 2 – 1,5 – 2 – 3Ī stack is a FILO data structure: First-In Last-Out. The following page gives more explanations of the main memory address modes used in low-level languages.

In the code above the sign is used to indicate when indirect addressing is used. The above code will hence only work with an LMC simulator that supports indirect addressing. However to access the value stored at the front (dequeue) or rear (enqueue) memory locations of the queue it is necessary to use indirect addressing. The LMC language was initially implemented to only support direct addressing: Each operand is a memory location of where the data to be used is stored. The program will stop if the user selects a value different from 1 or 2 from the menu.If the queue is empty, the program will output the error code -2. They will then be redirected to the start of the program to input their next option from the menu. If the user opts for option 2, a value will be removed from the queue and displayed as an output.

Enqueue javascript algorightm full#

The queue will be full once it reaches memory location 99. The queue will be stored in memory starting at memory location 50. If the queue is full, the program will output the error code -1. If the user opts for option 1, they will then need to input the value to enqueue.The user needs to input one of the following three menu options:.

Low Level Implementation of a queue using LMC: menu INP When implementing a Queue data structure we need to implement two algorithms/functions to enqueue a new value at the end of the queue and to dequeue a value from the front of the queue.Īlgorithm to enqueue a value to a queue: FUNCTION ENQUEUE(value):Īlgorithm to dequeue a value from a queue: FUNCTION DEQUEUE(): Two pointers are needed to implement a queue data structure: A front pointer which holds the memory address of the first item of the queue and a rear pointer which holds the memory address of the last item of the queue.

An item that is added ( enqueue) at the end of a queue will be the last one to be accessed ( dequeue). We will use an upgraded version of Little Man Computer (LMC) that supports indirect addressing to to do.Ī queue is a FIFO data structure: First-In First-Out in other words, it is used to implement a first come first served approach.

Enqueue javascript algorightm how to#

In this post we will investigate how to implement a queue and a stack data structure using low-level programming.