Перегрузка << и >>

[Arrioh]

Что-то не правильно делаю. Компилятор пишет:" Отсутствие оператора << соответствующим операндам" Вот код:

#ifndef COM_H
#define COM_H
#include <iostream>


class complex
{
private:
	double real;
	double imag;
public:
	complex();
	complex(const double _real, const double _imag);

	friend complex operator+(const complex & c1, const complex & c2);
	friend complex operator-(const complex & c1, const complex & c2);
	friend complex operator*(const complex & c1, const complex & c2);
	friend std::ostream & operator<<(const std::ostream & os, const complex & c1);
	friend std::ostream & operator>>(const std::ostream & os, const complex & c1);
};


#endif

#include "complexO.h"

complex::complex()
{
}
complex::complex(const double _real, const double _imag)
{
	real =_real;
	imag =_imag;
}
complex operator+(const complex & c1, const complex & c2)
{
	complex temp;
	temp.real = c1.real + c2.real;
	temp.imag = c1.imag + c2.imag;
	return temp;
}
complex operator-(const complex & c1, const complex & c2)
{
	complex temp;
	temp.real = c1.real - c2.real;
	temp.imag = c1.imag - c2.imag;
	return temp;
}
complex operator*(const complex & c1, const complex & c2)
{
	complex temp;
	temp.real = c1.real * c2.real;
	temp.imag = c1.imag * c2.imag;
	return temp;
}
 std::ostream & operator<<(const std::ostream & os , const complex & c1)
 {
	os << c1.real << ", " << c1.imag;
	 return os;
 }
std::ostream & operator>>(const std::ostream & os, const complex & c1)
{
	os >> c1.real; 
	cout << endl;
	os >> c1.imag;
	return os;
}

[Abstraction]

Поток не должен быть const.

[Arrioh]

Я дибил. спс. Тема закрыта)