ERROR C2676

#ifndef NL_H
#define NL_H

#include <iosfwd>

namespace ZJ
{
    /**
        Insert a newline character ‘\n‘
        without flushing the ostream
    */
    std::ostream& nl(std::ostream& os);
}

#endif // NL_H

#include "nl.h"

using namespace std;

ostream& ZJ::nl(ostream& os)
{
    return os << ‘\n‘;
}

#include "nl.h"

#include <iostream>

using namespace ZJ;
using namespace std;

int main()
{
    cout << "newlines"<< nl << "between"<< nl
        << "each"<< nl << "word"<< endl;
    cout << "................................";
        
    return 0;
}