Visual C++ friend function problem

i tired to use friend for << operator in Visual c++ but it gives me error that i cant access private variable in the class

can anyone help me how to fix this problem

thx u

here is examples of a simple program that is perfectly legal but n0t in visual c++

Code:

// Fraction.cpp
#include <iostream>
#include <cmath>
#include "Fraction.h"
using namespace std;

Fraction::Fraction() : numerator(0), denominator(1) { }

Fraction::Fraction(int n) : numerator(n), denominator(1) { }

Fraction::Fraction(int n, int d) {
   if (0 == d) {
      cout << "Illegal value for denominator" << endl;
      exit(1);
   }

   numerator = n;
   denominator = d;
   reduce();
}

void Fraction::reduce() {
   int g = gcd(abs(numerator), abs(denominator));
   numerator /= g;
   denominator /= g;
}

//ERROR in Visual C++ here, Can't access private variable

ostream& operator<< (ostream& output, const Fraction& f1) {
   if (((f1.numerator < 0) || (f1.denominator < 0))
      && !((f1.numerator < 0) && (f1.denominator < 0)))
      output << " - ";
   output << abs(f1.numerator) << " / " << abs(f1.denominator);
   return output;
}

istream& operator>> (istream& input, Fraction& f1) {
   int n, d;
   char ch;
   input >> n >> ch >> d;
   if (ch != '/') {
      cout << "Fraction format error." << endl;
      exit(1);
   }
   if (0 == d) {
      cout << "Illegal value for denominator." << endl;
      exit(1);
   }
   f1.numerator = n;
   f1.denominator = d;

   return input;
}

// Helper funtion which returns gcd of two numbers
int Fraction::gcd(int x, int y) {
   if (x % y == 0)
      return y;
   return gcd(y, x % y);
}

Code:

// Fraction.h
#ifndef FRACTION_H
#define FRACTION_H

class Fraction {
   public:
      Fraction();
      Fraction(int);
      Fraction(int, int);
      double getFraction() const {return ((double) numerator / denominator);}
      int getNumerator() const {return numerator;}
      int getDenominator() const {return denominator;}
      friend ostream& operator<< (ostream&, const Fraction&);
      friend istream& operator>> (istream&, Fraction&);

   private:
      void reduce();
      static int gcd(int, int);
      int numerator, denominator;
};

#endif

BTW, im using Visual C++ 6.0

You failed to mention the other errors that came before that one. The problem is that the compiler doesn't recognize ostream and istream in the header file. You must #include <iostream> and add std:: to the stream names.

This is almost always a good place to start when sorting through lots of errors:

Code:

fraction.h(13) : error C2061: syntax error : identifier 'ostream'

oh i c

stupid me

how could i forgot abt
using namespace std;

damn took me the whole day y my hw dont work
now all done

thx