Implementations of Stack and Queue Using Linked Lists Stack A stack is a LIFO (last-in, first-out) data structure. It is implemented using a stack point...
Implementations of Stack and Queue Using Linked Lists
Stack
A stack is a LIFO (last-in, first-out) data structure. It is implemented using a stack pointer, which keeps track of the top element in the stack. The stack is maintained as a linear chain of nodes, where each node holds a data item and a pointer to the next node.
Example:
Node 1 (data)
Node 2 (data)
Node 3 (data)
Node 4 (data)
Queue
A queue is a FIFO (first-in, first-out) data structure. It is implemented using a queue pointer, which keeps track of the first element in the queue. The queue is maintained as a linear chain of nodes, where each node holds a data item and a pointer to the next node.
Example:
Node 1 (data)
Node 2 (data)
Node 3 (data)
Node 4 (data)
Node 5 (data)
Implementations Using Linked Lists
Stack Implementation:
Create a pointer called top to point to the top node in the linked list.
Initialize top to point to the head node of the linked list.
Push a new node onto the top of the stack by creating a new node and assigning its data to the data field of the top node.
Update top to point to the new node.
Pop the top element from the stack by accessing the data field of the top node.
Repeat this process until the stack is empty.
Queue Implementation:
Create a pointer called front to point to the first node in the linked list.
Initialize front to point to the head node of the linked list.
Push a new node onto the front of the queue by creating a new node and assigning its data to the data field of the front node.
Update front to point to the new node.
Remove the front element from the queue by accessing the data field of the front node.
Repeat this process until the queue is empty.
Advantages and Disadvantages
Stack
Advantages:
LIFO data structure, which is efficient for operations like push and pop.
Simple implementation.
Disadvantages:
Limited flexibility for queue operations (e.g., peek).
Can become inefficient for large data sets due to the LIFO operation.
Queue
Advantages:
FIFO data structure, which is more efficient for operations like peek and dequeue.
Can be implemented with a single pointer.
Disadvantages:
More complex implementation compared to stacks.
Limited flexibility for push operations