Strange compile errors

[Tirno]

Hey,

I was compiling an old programming assignment about manipulating polynomials represented as linked list of its terms and I ran into a plethora of unfamiliar errors. I originally used Visual Studio Express to do the assignment, where it successfully compiled and ran, if I remember correctly. Recently, however, I installed Ubuntu on an old Thinkpad and decided to give gcc/g++ a test run. Unfortunately, it failed to compile and gave me a whole host of errors in the header file where I define my term and polynomial classes. I didn't get these errors in VS and don't see why I'd be getting them now. Here are the errors and relevant code.

In file included from assign7.cpp:9:
Poly.h:20: error: expected ‘,’ or ‘...’ before ‘&’ token
Poly.h:20: error: ISO C++ forbids declaration of ‘Poly’ with no type
Poly.h:21: error: expected ‘,’ or ‘...’ before ‘&’ token
Poly.h:21: error: ISO C++ forbids declaration of ‘Poly’ with no type
Poly.h: In function ‘std::ostream& operator<<(std::ostream&, const Poly&)’:
Poly.h:31: error: ‘float Term::coefficient’ is private
Poly.h:286: error: within this context
Poly.h:31: error: ‘float Term::coefficient’ is private
Poly.h:291: error: within this context
Poly.h:32: error: ‘int Term::degree’ is private
Poly.h:295: error: within this context
Poly.h:31: error: ‘float Term::coefficient’ is private
Poly.h:296: error: within this context
Poly.h:32: error: ‘int Term::degree’ is private
Poly.h:297: error: within this context
Poly.h:31: error: ‘float Term::coefficient’ is private
Poly.h:299: error: within this context
Poly.h:31: error: ‘float Term::coefficient’ is private
Poly.h:302: error: within this context
Poly.h:31: error: ‘float Term::coefficient’ is private
Poly.h:306: error: within this context
Poly.h:32: error: ‘int Term::degree’ is private
Poly.h:307: error: within this context
Poly.h:31: error: ‘float Term::coefficient’ is private
Poly.h:309: error: within this context
Poly.h:32: error: ‘int Term::degree’ is private
Poly.h:309: error: within this context
Poly.h:33: error: ‘Term* Term::next_term’ is private
Poly.h:313: error: within this context
Poly.h:31: error: ‘float Term::coefficient’ is private
Poly.h:316: error: within this context

/*


[Removed personal info]


*/

#include <iostream>
#include <string>
#include <sstream>
#include <math.h>
using namespace std;

/* A class representing a term of a polynomial as a node in a linked list. Contains value of coefficient, 
degree, and a pointer to the next list */
class Term
{
	friend class Poly;
	friend ostream& operator<<(ostream& out, const Poly& p);
	friend istream& operator>>(istream& in, const Poly& p);
public:
	Term(float c, int d) { coefficient = c; degree = d; next_term = 0; }
	Term() { coefficient = 0; degree = 0; next_term = 0; }
	const float evaluate(float x) const { return ( coefficient * pow(x,degree) ); }
	const Term operator+(const Term& b) const;
	const Term operator*(const Term& b) const;
	const bool operator==(const Term& b) const;
	const bool operator!=(const Term& b) const;
private:
	float coefficient;
	int degree;
	Term *next_term;
};

ostream& operator<<(ostream& out, const Poly& p)
{
	Term *current, *temp;
	current = p.first_term;

	if((current->coefficient) < 0)
		out << "-";

	while(current != 0)
	{
		if(current->coefficient == 0)
			out << "0";
		else
		{
			if(current->degree == 0)
				out << fabs(current->coefficient);
			else if(current->degree == 1)
			{
				if(fabs(current->coefficient) == 1)
					out << "x";
				else
					out << fabs(current->coefficient) << "x";

			}
			else
			{

				if(fabs(current->coefficient) == 1)
					out << "x^" << current->degree;
				else
					out << fabs(current->coefficient) << "x^" << current->degree;
			}
		}

		temp = current->next_term;
		if(temp != 0)
		{
			if((temp->coefficient) < 0)
				out << " - ";
			else
				out << " + ";
		}

		current = temp;
	}

	return out;

}