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Reverse a linked list geeksforgeeks in c++

coder answered on December 18, 2021 Popularity 9/10 Helpfulness 2/10

answer Reverse a linked list geeksforgeeks in c++

related print linked list reverse order in c++

Reverse a linked list geeksforgeeks in c++

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/* 
   problem link: https://practice.geeksforgeeks.org/problems/reverse-a-linked-list/1/?page=1&difficulty[]=0&status[]=unsolved&sortBy=submissions#
*/
///////////////////////////////////////////////////////////////////////////////////////////
class Solution
{
    public:
    //Function to reverse a linked list.
    struct Node* reverseList(struct Node *head)
    {
        // code here
        // return head of reversed list
        Node *p, *c, *n;
        p=NULL;
        c=head;
        while(c!=NULL)
        {
            n=c->next;
            c->next=p;
            p=c;
            c=n;
        }
        head=p;
        return head;
    }
    
};

Popularity 9/10 Helpfulness 2/10 Language cpp

Source: www.codegrepper.com

Tags: c++ linked-list reverse

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Contributed on May 17 2022

coder

0 Answers Avg Quality 2/10

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print linked list reverse order in c++

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#include<iostream>
using namespace std;

struct node
{
	int data;
	node* next;
};
node* insert(node* head, int value)
{
	node* temp1 = (node*)malloc(sizeof(node));
	temp1->data = value;
	temp1->next = NULL;
	if (head == NULL)
	{
		head = temp1;
	}
	else
	{
		node* temp2 = head;
		while (temp2->next!=NULL)
		{
			temp2 = temp2->next;
		}
		temp2->next = temp1;
	}
	return head;
}
void print(node* p)
{
	if (p == NULL)
		return;
	cout << p->data << " ";
	print(p->next);
}
void reverse_order(node* p)
{
	if (p == NULL)
		return;
	reverse_order(p->next);
	cout << p->data << " ";
}
int main()
{
	node* head = NULL;
	head = insert(head, 1);
	head = insert(head, 2);
	head = insert(head, 3);
	print(head);             //list: 1 2 3.
	cout << endl;
	reverse_order(head);    //list: 3 2 1.

	return 0;
}

Popularity 10/10 Helpfulness 4/10 Language cpp

Source: codejudge.blogspot.com

Tags: c++

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Contributed on Dec 18 2021

coder

0 Answers Avg Quality 2/10

Reverse a linked list geeksforgeeks in c++

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