ArrayToLinkedList.DLL

#include<iostream>
#include<stdlib.h>
#include<vector>

using namespace std;

struct node {
    int data;
    node *next;
    node *back;

    node (int data1) {
        data=data1;
        next=nullptr;
        back=nullptr;
    }

    node (int data1,node*next1,node*back1) {
        data=data1;
        next=next1;
        back=back1;
    }
};

node *convertarr2DLL (vector<int>&arr) {
    node *head=new node(arr[0]);
    node *prev=head;
    for (int i=1;i<arr.size();i++) {
        node *temp=new node(arr[i],nullptr,prev);
        prev->next=temp;
        prev=temp;
    }
    return head;
}

void printNode(node *head) {
    while(head!=nullptr) {
        cout<<head->data<<" ";
        head=head->next;
    }
}
int main() {
    vector<int> arr={1,2,3,4,5};
    node *head=convertarr2DLL(arr);
    printNode(head);
}