Delete a specified node from a C linked list

time：2024-12-12 08:02:22 Tech Trends

c language linked list deletion node

In C, a linked list deletion node can be performed in two ways:

1. Delete a node in a certain location: In this method, you need to pass in the head node of the linked list and the location to be deleted. First, you need to determine whether the location is legitimate, and then use two pointers, one to the current node and one to the previous node of the current node. When the value of the current node is equal to the value to be deleted, the next pointer of the previous node of the current node points directly to the next node of the current node, and then the memory of the current node is released. Finally, the head node of the linked list is returned.

2. Delete the node with the value of x: This method needs to pass in the head node of the linked list and the value to be deleted. Similarly, you need to determine if the linked list is empty, and then use two pointers, one to the current node and one to the previous node of the current node. When the value of the current node is equal to the value to be deleted, the next pointer of the previous node of the current node points directly to the next node of the current node, and then the memory of the current node is released. Finally, the head node of the linked list is returned.

It should be noted that when deleting a node, if the node is empty, this parameter is invalid. In addition, it is also necessary to consider whether the content saved by the deleted node needs to be released.

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