Concept Behind Circular Queue
There are two different concepts behind circular queue depending upon which data structure it is using in its implementation:
For Linked List Implementation, we can directly use the circular linked list where the last element of the list points to the head of the list.
For Array Implementation
For array implementation for circular queue, we use the mathematical concept of modular (or circular) increment. In this concept, a value that is being incremented will wrap around a particular threshold value. It can be achieved using the formula.
value = (value + 1) % threshold_value;
For Example, if value is 9, and threshold is 10. Incrementing the value by 1 will make it 10 and dividing it with 10 will yield the remainder 0.
C++ Program to Implement Circular Queue
In C++, Queues are a fundamental data structure in computer science which works on the principle of FIFO (First In, First Out). They can be implemented using both array and linked list. A circular queue is a type of queue in which the last element is connected to the first element, forming a circular structure. In this article, we’ll learn about circular queue, how to implement it in C++, and analyze its complexity.
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