i need help

Compilation failed with errors:

main.cpp: In function 'bool testDLinkedListConstructor$()\text{'}$:

main.cpp:$38$:$27$: error: 'int DLinkedList::size' is private within this context

$38|$ assertCustom$($list$.$size$()==0,$ "Expected size $=0,$ but got $"+$ std::to$\_$string$($list$.$size$()))$;Recommendation: Check for recursive inclusion, unhandled exceptions, logical errors, or syntax issues in the code.

here is my code:

#include "DLinkedList.h$"$

#include

$//$ Initialize the static variable activeNodes with $0$ before main function

int DNode::activeNodes $=0$;

int main$()\{$

DLinkedList list; $//$ instance of DLinkedList

$//$ Add $3$ elements to the front of the list

list.addFront$(10)$;

list.addFront$(20)$;

list.addFront$(30)$;

$//$ Add $2$ elements to the back of the list

list.addBack$(40)$;

list.addBack$(50)$;

$//$ Traverse the list from head and print elements

std::cout $<<$ "List from head: $"$;

list.print$($true$)$;

$//$ Traverse the list from trailer and print elements in reverse order

std::cout $<<$ "List from trailer: $"$;

list.print$($false$)$;

$//$ Remove one element from the front and one from the back

list.removeFront$()$;

list.removeBack$()$;

$//$ Print the list again after removals

std::cout $<<$ "List after front and back removals: $"$;

list.print$($true$)$;

$//$ Add another element to the front and one to the back

list.addFront$(60)$;

list.addBack$(70)$;

$//$ Print the list after all operations

std::cout $<<$ "Final list: $"$;

list.print$($true$)$;

$//$ Display the current size of the list

std::cout $<<$ "Current List Size: $"<<$ list.getSize$()<<$ std::endl;

$//$ Display the number of active nodes

std::cout $<<$ "Active Nodes: $"<<$ list.activeNodeCount$()<<$ std::endl;

return $0$;

$\}$