Effectively insert node at beginning of circular linked list in c++
C++ program for Effectively insert node at beginning of circular linked list . Here more information.
// Include header file
#include <iostream>
using namespace std;
// C++ Program
// Insert node at beginning of circular linked list
// Using head and tail pointer
// Define class of linked list Node
class LinkNode
{
public:
int data;
LinkNode *next;
LinkNode(int data, LinkNode *first)
{
// Set node value
this->data = data;
this->next = first;
}
};
class CircularLinkedList
{
public: LinkNode *head;
LinkNode *tail;
CircularLinkedList()
{
this->head = nullptr;
this->tail = nullptr;
}
// Insert node at begining of circular linked list
void insert(int value)
{
// Create a node
LinkNode *node = new LinkNode(value, this->head);
if (this->tail == nullptr)
{
// First node of linked list
this->tail = node;
}
// Make new head
this->head = node;
// Connecting the last node to the top of the next field
this->tail->next = this->head;
}
// Display node element of circular linked list
void display()
{
if (this->head == nullptr)
{
cout << "Empty Linked List" << endl;
}
else
{
cout << "Linked List Element :";
LinkNode *temp = this->head;
// iterate linked list
while (temp != nullptr)
{
// Display node
cout << " " << temp->data;
if (temp == this->tail)
{
// Stop iteration
// Or break;
return;
}
// Visit to next node
temp = temp->next;
}
}
}
};
int main()
{
CircularLinkedList *task = new CircularLinkedList();
// Add following linked list nodes
task->insert(8);
task->insert(7);
task->insert(6);
task->insert(5);
task->insert(4);
task->insert(3);
task->insert(2);
task->insert(1);
// Display node
task->display();
return 0;
}
Output
Linked List Element : 1 2 3 4 5 6 7 8
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