Program Menhitung Suku Ke-n Dari Deret Fibonacci (Rekursif)

#include <conio.h>
#include <iostream.h>

class Operator{
      friend ostream& operator<<(ostream&, Operator&);
      friend istream& operator>>(istream&, Operator&);

public:
       long fibonacci(int);

private:
        int n;
};

int fibonacci (int n){
    if((n==1) || (n==2))return (1);
    else return (fibonacci(n-1)+fibonacci(n-2));
}
ostream& operator<<(ostream& out, Operator& a)
{ for (int i=1;i<=a.n;i++)
out<<fibonacci(i)<<"";
return out;
}

istream& operator>>(istream& in, Operator& a){
cout<<"sampai suku ke- ";
in>>a.n;
return in;
}

main()
{
      Operator run;
      cin>>run;
      cout<<run;
    getch();
}