I will try my best to reply as soon as possible. If you have any doubt for C Program to Reverse a Linked List without recursion, kindly comment below. These questions are asked in many interview rounds. I was asked to write code for this program in the IBM ISDL interview (On-campus NIT Trichy). C Program to reverse the digits of a number using recursion. C program to reverse the content of the file and print it. C Program to Reverse a Stack using Recursion. Reverse a Linked list is one of the important questions to be asked in many placement interviews. C Program To Merge A Linked List Into Another Linked List At Alternate Positions. We are traversing each element at one time, so its complexity is O(n). If you are new to the C programming and C structure, you may find it a little difficult. The difficulty level of this program is medium. If you dont care about keeping the original, then just use this method (below) on your list, no need then to make a copy. Output : Display Linked List: 10 20 30 40ĭisplay Reversed Linked List:: 40 30 20 10 Complexity for Program to Find the Reverse Linked List Then you could (if you need to keep the original list unmodified): - Make a copy of your entire list. Printf("\nDisplay Reverse Linked List: ") S = pointer to the last element of reversed linked list * Function to reverse a Linked List elements Struct node* pTemp = (struct node*)malloc(sizeof(struct node*)) Struct node* insertNodeAtEnd(struct node*p, int n) ![]() Logically reverse a linked list function seems kinda difficult, but if you see the code for it, it is so simple and easy to understand.Ĭ Program to Reverse a Linked List Without Recursion (C/C Code)Īlso added comments in the code where it is required so that it will be easy to understand. This reverse a Linked List function will maintain two lists: one linked list contents reverse elements and second linked list contents remaining elements that need to be reversed. It will exchange the links between every two consecutive nodes. The original Linked list will be passed to the function to reverse. 1 LinkedList Questions: Add Two Numbers as Linked List 2 LinkedList Questions: Delete a given node in constant time. Reverse the Linked List without Recursion in C/C Time Complexity for this program will be O(n) as we are calling recursion at once for each node. loop detected Solution To reverse a linked list, we need to change. After running this program element will print Linked List in reverse order as 30 20 10. To detect a loop in a linked list, we can use the Floyd's cycle - finding algorithm. Display Linked List in reverse order using recursionĮlements in the Linked List are 10, 20, 30. PNode3 = (struct node *)malloc(sizeof(struct node *)) PNode2 = (struct node *)malloc(sizeof(struct node *)) PNode1 = (struct node *)malloc(sizeof(struct node *)) call recursive function for next node (p->pLink)ĭifficulty Level: Moderate if you are familiar with Linked List and Recursion.Ĭ Program to Print Linked List in Reversed Order using Recursion.Prerequisite: Recursion in C Explained with ExampleĪlgorithm: Here we need head recursion. ![]() Print Linked List in Reverse Order using Recursion in C Examples: Input: Head of following linked list. We need to reverse the list by changing links between nodes. In this programming tutorial, we are reversing linked list with and without recursion. Given a pointer to the head node of a linked list, the task is to reverse the linked list. Reverse Singly Linked List Implementation (Logic):īasically, there are two approaches to reverse the linked list. ![]() We have also solved the same problem in Java as well. Make a recursive call for reverseRecursion (ptrOne.next,ptrTwo.next,null) Run This Code. Call reverseRecursion (head,head.next,null) Reverse the ptrOne and ptrTwo. Initialize them as ptrOne head ptrTwohead.next, prevNode null. In this post, we see how to reverse the elements of the linked list using three-pointers in C/C . Recursive Approach: Take 3 nodes as Node ptrOne,Node ptrTwo, Node prevNode. In the previous post, we have seen the implementation of the Linked List in C. Prerequisite: How to create Linked List in C/C ? Each node has a data variable to store data and a node pointer to point next node in the linked list. The linked list is the crucial data structure that contains a list of the nodes.
0 Comments
Leave a Reply. |