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  1. Practice
  2. Data Structures
  3. Linked Lists
  4. Insert a Node at the Tail of a Linked List
  5. Discussions

Insert a Node at the Tail of a Linked List

  • shubhvratj + 4 comments

    SinglyLinkedListNode* insertNodeAtTail(SinglyLinkedListNode* head, int data) {

        SinglyLinkedListNode *new_node,*ptr;
    new_node = new SinglyLinkedListNode();
    new_node->data = data;
    new_node->next = NULL;
    if(head == NULL){
        head = new_node;
        return head;
    }else{
        ptr = head;
        while(ptr != NULL){
            ptr = ptr->next;
        }
        ptr->next = new_node;
        new_node->next = NULL;
return head;    
    }

    }

    can you please help me with this code?

    • abhishekjoshi261 + 0 comments

      Node* Insert(Node *head,int data) { struct Node *temp,*tail,*ptr; temp=new Node; temp->data=data; temp->next=NULL; if(head==NULL) { head=temp;} else { ptr=head; while(ptr!=NULL) { tail=ptr; ptr=ptr->next; } tail->next=temp; } return head;

      }

      bro i think you missed the struct function and above is the soln that worked for me pm me if you find any problem

    • asmitaverma + 0 comments
      [deleted]
    • asmitaverma + 2 comments

      Here's my solution in C++14. The class definition of SinglyLinkedListNode specifies that the constructor has an argument which is the data part of the node to be inserted.

      SinglyLinkedListNode* insertNodeAtTail(SinglyLinkedListNode* head, int num){

      SinglyLinkedListNode* node = new SinglyLinkedListNode(num);
node->data = num;
node->next = NULL;

if(head == NULL){
    head = node;
}

else{
    SinglyLinkedListNode* temp;
    temp = head;
    while(temp->next != NULL){
        temp = temp->next;
    }
    temp->next = node;
}

return head;

      }

      • anamalaii + 0 comments

        Thank you

      • alexey_chekhovi1 + 0 comments

        SinglyLinkedListNode* node = new SinglyLinkedListNode(num);

        Works.

        SinglyLinkedListNode *newNode = new SinglyLinkedListNode();

        solution.cc:61:62: error: no matching function for call to ‘SinglyLinkedListNode::SinglyLinkedListNode()

        So we do not have an empty constructor, but do have a constructor with parameters. The one who wrote the background of this task should be immediately exterminated.

    • akkidewangan96 + 0 comments

      new_node = new SinglyLinkedListNode(data);

      try this in 2nd line