Скачать или смотреть Arrày Based implementation of Stack ADT | Data Structures | SNS Institutions

#designthinking #snsdesignthinkers #snsinstitutions

Array Based Implementation of Stack ADT

A stack is a linear data structure that follows the Last In First Out (LIFO) principle, where the element inserted most recently is removed first. The Array-based implementation of a stack uses a fixed-size array to store stack elements.

In this approach, the stack is represented with:

1. Array – to hold elements.


2. Top pointer – an integer variable that indicates the index of the most recently inserted element. Initially, top = -1 when the stack is empty.



Operations:

Push (Insert): To add an element, the top is incremented by one, and the new element is placed at that index. If top reaches the maximum size - 1, the stack is considered full (overflow).

Pop (Delete): To remove an element, the element at the top index is returned, and top is decremented by one. If top = -1, the stack is empty (underflow).

Peek (Top): Returns the current top element without modifying the stack.


Advantages:

Simple and direct implementation.

Provides constant time complexity O(1) for push, pop, and peek operations.


Limitations:

The stack size is fixed at the time of creation, so it cannot grow dynamically.

Wastage of memory may occur if the array is not fully utilized.