operator<< overload problem

I created complex class:

Code:

---

class CComplex
{
private:
    double m_dReal;
    double m_dImage;
public:
        CComplex() :m_dReal(0),m_dImage(0){}
        CComplex(double re, double im=0) :m_dReal(re),m_dImage(im){}
        CComplex(const CComplex& x):m_dReal(x.getReal()),m_dImage(x.getImage()){}
        double getReal () const {return m_dReal;}
        double getImage ()const  {return m_dImage;}
        CComplex operator+ (const CComplex& r)const;
        CComplex& operator+= (const CComplex& r);
        CComplex operator* (const CComplex& r)const;
        CComplex& operator*= (const CComplex& r);
        CComplex& operator= (const CComplex& r);
        bool operator== (const CComplex& r) const;
        bool operator!= (const CComplex& r) const;
        friend ostream& operator << (ostream& ro, const CComplex& r);
};

---

when trying to compile i got the following error:
ISO C++ forbids declaration of `ostream' with no type
complex.H:34: error: `ostream' is neither function nor member function; cannot be declared friend
complex.H:34: error: expected `;' before '&' token
complex.C: In function `std::ostream& operator<<(std::ostream&, const CComplex&)':

can't find what's wrong....

You should fully qualify ostream as std::ostream. Additionally, you should #include <iosfwd>, and then #include <ostream> in the file where you define the overloaded operator<<.

wow!!
thanks..... you are the best!

i have the following class

Code:

---

#ifndef H_Student
#define H_Student


#include <iostream>
#include <string>

using namespace std;

class Student
{
    friend ostream& operator<< (ostream&, const Student&);

    public:
        Student(string n="",float g = 0.0f,long j = 0):name(n),gpa(g),jagID(j){};
        string convertJag(long);
        friend class StudentNode;
        friend class NodeList;
       
       
    private:
        string name;
        float  gpa;
        long  jagID;
           
};

---

with ostream in .cpp

Code:

---

ostream& operator<< (ostream& output, const Student& s)
{
    output <<s.name<<", GPA = "<<s.gpa<<", JagID = "<<convertJag<<s.jagID;
    return output;
}

---

the errors i get are:
29 expected `,' or `...' before '&' token
30 ISO C++ forbids declaration of `Student' with no type
In function `std::ostream& operator<<(std::ostream&, int)':
31 `s' undeclared (first use this function)
(Each undeclared identifier is reported only once for each function it appears in.)
[Build Error] [Student.o] Error 1


what am i typing in wrong ive looked in 3-4 different books and they the same syntax for overloading<<

It tells me that there is one or more types it doesn't recognize. You sure you includeed student.h in the .cpp file?

HAHA yea i forgot to include that. thanks. it always helps just to show someone else.