In linked list implementation of a queue, from where is the item deleted?
Question
In linked list implementation of a queue, from where is the item deleted?
Solution
In a linked list implementation of a queue, the item is deleted from the front of the queue. Here are the steps:
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Check if the queue is empty. If it is, then there are no items to delete and you can end the process here. If not, proceed to the next step.
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The front of the queue is represented by the head of the linked list. So, you need to delete the node that the head is pointing to.
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To do this, first make a temporary pointer that also points to the head node.
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Then, move the head pointer to the next node in the list. In a singly linked list, you can do this by setting the head to head->next.
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Now, you can delete the node that the temporary pointer is pointing to. This removes the front item from the queue.
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Finally, check if the head is now null (i.e., the queue is empty). If it is, you also need to set the rear to null.
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The deletion process is now complete.
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