We will define a pointer, top, and initialize it to null. Constructor to create a new node.Next is by default initialized as null We will be using this same Node class to also implement the queue in the later part of this article. So, to alleviate this problem, we use a linked list to implement the stack so that it can grow in real time.įirst, we will create our Node class which will form our linked list. It can also result in “stack overflow” if we try to add elements after the array is full. The limitation, in the case of an array, is that we need to define the size at the beginning of the implementation. Stack can be implemented using both arrays and linked lists. Implementing Stack Functionalities Using a Linked List Peek – it will show the element on the top of the stack (without removing it).If we try to perform a pop operation on an empty stack, then it is said to be a stack underflow condition. Elements are always removed from the top of the stack. Pop – it specifies removing an element from the stack.If we try to insert an element when the stack is full, then it is said to be a stack overflow condition. Push – it specifies adding an element to the stack.Here we will define three operations on a stack: Since it allows insertion and deletion from only one end and the element to be inserted last will be the element to be deleted first, it is called the 'Last in First Out' data structure (LIFO). If we want to remove an element from the stack, we can only remove the top element from the stack. New elements are added at the top of the stack. What Is a Stack?Ī stack is a linear data structure which allows the adding and removing of elements in a particular order. Implementing queue functionalities using linked lists.īefore proceeding further, I would recommend downloading the source code from GitHub.Implementing stack functionalities using linked lists.Please visit my earlier article on linked list implementation in C# to get a basic understanding of linked lists. We will discuss various I/O operations on these data structures and their implementation using another data structure, i.e., linked lists. In this article, we will be discussing two data structures – Stack and Queue.
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