function to swap two elements

Below is the function that reverses the given stack using insert_at_bottom()

* Given two force vectors, find out whether they are parallel, perpendicular or neither. Let the first vector be A = a1 i +a2 j + a3 k and the second

add this type of condition-> add(a,af,b,bf) means if a is af then b must need to be bf

Function to add an item to the queue. It changes rear and size

push an item to stack

Utility function to create a new tree node

inorder also sort the bst,we don't need new function.

Function to insert an element into the tree

remove an item from stack

prints all occurrences of pattern in text using Z algo

Based on Lecture

implement enqueue method by using only stacks and the push and pop functions

create Node

Function to remove an item from queue. It changes front and size