i have 2 "errors term does not evaluate to a function tacking 2 arguments" in line 64

[ronindx]

#include "Bibleoteca.h"
#include<list>
#include<vector>
#include<algorithm>
#include<iostream>
using namespace std;

void Bibleoteca::Adauga(Carte book)
{
	books.push_back(book);
	cout << endl;
}
void Bibleoteca::Afis()
{
	for (auto& elem : books)
	{

		elem.Print();
	
	}
}
void Bibleoteca::cauta_Titlu(string title)
{
	for (auto  &elem : books)
	{
		if (elem.titlu == title)
		{
			 elem.Print();
		}
	}
}


//void Bibleoteca::caut_Editura(string editura)
//{
//	auto reult = find(begin(books), end(books), editura);
//	if (reult != end(books))
//	{
//		this->Afis();
//	}
//	else
//	{
//		cout << "librarie nu contine" << endl;
//	}
//}

Carte * Bibleoteca::caut_ISBN(string ISBN)
{
	for (auto &elem : books)
	{
		if (elem.ISBN == ISBN)
		{
			return &elem;
		}
	}
	return nullptr;
}
void Bibleoteca::unic_ISBN(string ISBN)
{

	auto count =  unique(books.begin(), books.end(),books.size());

}

[VictorN]

1. Please use COODE tags while posting code snippets.
2. Where is your "line 64"?

[2kaud]

auto count = unique(books.begin(), books.end(),books.size());

If this is using std::unique()? If yes, then its 3rd param is wrong. Either don't have one or it needs to be binary predicate.
See auto count = unique(books.begin(), books.end(),books.size());

If this is not std::unique(), what's the implementation/declaration?