Menghitung Deret Fibonacci

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

using namespace std;
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;
         }

int main(int argc, char *argv[])
{
    Operator run;
    cin>>run;
    cout<<run;
    system("PAUSE");
    return EXIT_SUCCESS;
}