Deletion in Linked List in c++ algorithm

 

for deletion in a linked list in C++:

Algorithm 1: Deleting the first node in the list

1. Begin by passing the head pointer to the function
2. Create a temporary variable and set it equal to the head pointer
3. Update the head pointer to point to the next node in the list
4. Delete the node stored in the temporary variable
5. End the function

Algorithm 2: Deleting a node at a specific position

1. Begin by passing the head pointer and the desired position to the function
2. Check if the desired position is 1, if so, call the deleteFirstNode function
3. Create a temporary variable and set it equal to the head pointer
4. Use a loop to iterate through the list until the node before the desired position is found
5. Create a variable to store the address of the node that is to be deleted
6. Update the next pointer of the previous node to point to the next node, bypassing the node that is to be deleted
7. Delete the node stored in the variable created in step 5
8. End the function

Algorithm 3: Deleting the last node in the list

1. Begin by passing the head pointer to the function
2. Create a temporary variable and set it equal to the head pointer
3. Use a while loop to iterate through the list until the second to last node is found
4. Create a variable to store the address of the last node
5. Update the next pointer of the second to last node to be NULL
6. Delete the node stored in the variable created in step 4
7. End the function

It's important to note that when deleting a node, it's necessary to update the pointers of the previous and next nodes so that the list remains connected. Additionally, it's important to handle any edge cases, such as deleting the first or last node in the list.