![]() ![]() Patients that need help most urgently can be stored at the top and the list goes down. Patients can be stored in the queue in accordance to their condition. There are numerous real world applications of priority queues and the ability to delete elements from the queue serves great purpose. Whether one wants to delete one element or many, the class provides options to do it all. Overall, there are many different ways that one can delete elements from a priority queue. This method as seen, deletes all elements from the priority queue. The code for this can be seen below: priority_queue pq This method deletes all elements from the priority queue without deleting the actual structure. That begs the question, what if we would like to delete everything from a priority queue? There happens to be a way to do this as well. However, the above methods we have discussed only entail ways to delete one element from a priority queue. This ia also a great way to remove a specific element from a priority queue. that line deletes the element 30 from the priority queue This code can be seen below: priority_queue pq Thie method will keep the original priority queue without the element that needs to be deleted. Along with creating a new priority queue without the desired element to remove, one can utilize the erase function. This method goes along with method two as there is no specific remove element function in the priority queue. There are a couple other ways to delete elements in a priority queue which we will look at next. This would require an additional O(n) space complexity and would take O(n) time. This is a great way to remove a specific element without doing too much work. An example of using the pop function on a priority queue is shown below: priority_queue pq After deleting the top element, the next highest priority element becomes the new top element in the priority queue. It means that the element with the highest priority is deleted from the priority queue. The pop() function removes the top element from the priority queue. Pop(): The simplest and most common way to delete an element from the priority queue is by using the pop() function. The 4 Different ways to delete elements in a priority queue in C++ STL are: In this essay, we will discuss different ways to delete elements in a priority queue using C++ STL. C++ STL provides various functions to manipulate priority queue, including deleting elements. The element with the highest priority in the priority queue always appears at the top. ![]() The priority queue automatically arranges elements in a particular order based on the priority. There are 4 different methods such as pop, clear and much more.Ī priority queue is a container in C++ STL (Standard Template Library) that allows users to store elements with different priorities. In this article, we have presented different ways to delete elements in a priority queue in C++ STL.
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