![]() ![]() This operation is performed at the front end. In this operation, we pass no data to the queue. Its purpose is to delete an element from the queue. This operation is performed at the rear end. Its purpose is to add an element to the queue. Similarly, for deleting any element, the font side variable will be decremented. To insert another element, the rear side variable will be incremented. If this queue has four elements i.e 5,6,7 and 8 at index 0,1,2 and 3.So front end will point towards 5 and the read end will point towards 8. And the data will be deleted from the front end. The data will be inserted from the rear end. The deletion process in a queue is named ‘ dequeue ( )’.Ī queue has two open ends i.e rear and front. The insertion process in the queue is named ‘ enqueue( )’. The deletion process is performed from the other end in the queue which is called ‘ Front’. In Queue, insertion is performed from one end which is known as ‘ Rear’. Similarly, the person standing at the last will get his ticket at last. The person who is standing first in the line will get his ticket first. To understand this concept, let's take an example of persons standing in a line for reserving a train ticket. So the elements that will be inserted first, will also be removed first. The queue is an ordered less structure that follows the principle of FIFO ( First in first out). The data structure is a method of storing and organizing data. N_node = (struct*node) malloc (size of( struct node)) The insertion and deletion operation will be performed from the beginning of the list. Firstly structure will be created for a node. There is also a head part that contains the address of the first node. A node will consist of data and address fields. The singly-linked list will be used in this implementation. ![]() In this, we will first specify dynamic memory allocation. Implementation of Stack Using Linked List Then 'display()' the function will be used to traverse the stack. ![]() For displaying the topmost deleted value, firstly this top value will be stored in some variable ‘x’ and then that value will be displayed. We will pass no element in the pop function because always top element will be popped out in this. Data will be inserted into the stack using 'push()' function. Now different stack functions will be defined and then will be called in the main function. And we will represent this array in stack form using ‘int stack’. Now 6 blocks will be allocated in memory for this array. Let us consider that an array ‘A’ and integer having data size 6. While underflow conditions occur when we delete an element from an empty stack. Overflow condition occurs when we insert an element to the stack which is already having maximum elements. When we implement stack using, we first need to check overflow and underflow conditions. In this method, a linked list is used to implement the stack.Ī stack can be implemented by using an array with the help of static memory allocation. In this method, the stack is implemented using arrays. And if element ‘2’ is called, There will be two methods to allocate memory in this stack: If we call the pop( ) operation in this situation, no element will be removed due to the empty stack. It means that it can store only six elements from 0 to 5. So for this purpose, we have to find the size of this stack to add some data to this stack. We need to allocate memory in this stack. This container has one open end from where data can be inserted or deleted. Stack is represented by a container as shown below. It will return the topmost element of the stack without removing that element from the stack. In pop operation, no argument will be passed. The process of deleting an element from the stack is called ‘’ POP’’. The operation of putting an element into a stack is called ‘’ push’’. Initially, there will be no elements in the stack so the top will be equal to ‘-1’. Similarly, if we want to delete an element from the stack, it will be deleted from the top of the stack. If we want to place an element into the stack, it will be placed at the top of the stack. Insertion and deletion can be performed from only one side. So in this way, the last coin will be removed first according to the LIFO principle. Now if we want to remove coins, then the topmost coin which is the third coin will be removed first. If we start placing coins one after the other in such a way that the first coin will be placed first at the bottom and the next coin will come on above the first coin and so on. To understand this concept, let us take an example of arranging coins. It follows the LIFO principle which is the last-in and first-out rule. Elements in the stack are arranged sequentially. Stack is a collection of only similar data types. ![]() It follows the rule of insertion and deletion of data. ![]()
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