Implementation of Singly Link List using Classes of OOP in C++.
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#include <iostream> using namespace std; // Node class to represent // a node of the linked list. class Node { public: int data; Node* next; // Default constructor Node() { data = 0; next = NULL; } // Parameterised Constructor Node(int data) { this->data = data; this->next = NULL; } }; // Linked list class to // implement a linked list. class Singly_Linked_list { Node* head; public: // Default constructor Singly_Linked_list() { head = NULL; } // Function to add a // node at the end of the // linked list. void Insert_Node(int); // Function to print the // linked list. void printList(); // Function to delete the // node at given position void Remove_Node(int); }; // Function to delete the // node at given position void Singly_Linked_list::Remove_Node(int nodeOffset) { Node *Temporary1 = head, *Temporary2 = NULL; int ListLen = 0; if (head == NULL) { cout << "List empty." << endl; return; } // Find length of the linked-list. while (Temporary1 != NULL) { Temporary1 = Temporary1->next; ListLen++; } // Check if the position to be // deleted is less than the length // of the linked list. if (ListLen < nodeOffset) { cout << "Index out of range" << endl; return; } // Declare Temporary1 Temporary1 = head; // Deleting the head. if (nodeOffset == 1) { // Update head head = head->next; delete Temporary1; return; } // Traverse the list to // find the node to be deleted. while (nodeOffset-- > 1) { // Update Temporary2 Temporary2 = Temporary1; // Update Temporary1 Temporary1 = Temporary1->next; } // Change the next pointer // of the previous node. Temporary2->next = Temporary1->next; // Delete the node delete Temporary1; } // Function to add a new node. void Singly_Linked_list::Insert_Node(int data) { // Create the new Node. Node* newNode = new Node(data); // Assign to head if (head == NULL) { head = newNode; return; } // Traverse till end of list Node* Temporary = head; while (Temporary->next != NULL) { // Update Temporary Temporary = Temporary->next; } // add at the last. Temporary->next = newNode; } // Function to print the // nodes of the linked list. void Singly_Linked_list::printList() { Node* Temporary = head; // Check for empty list. if (head == NULL) { cout << "List empty" << endl; return; } // Traverse the list. while (Temporary != NULL) { cout << Temporary->data << " "; Temporary = Temporary->next; } } // Driver Code int main() { Singly_Linked_list list; // adding nodes list.Insert_Node(7); list.Insert_Node(8); list.Insert_Node(1); list.Insert_Node(3); cout << "The Elements in the singly link list: "; // Print the list list.printList(); cout << endl; // Delete node at position 2. list.Remove_Node(3); cout << "The Elements in the singly link list:"; list.printList(); cout << endl; return 0; } |