Thread: More Issues with <<overload!

I have another problem...

I have an overloaded << operator that won't work with external ofstream csis(csis is just a text file)...the errror I"m getting is:

c:\documents and settings\hp_administrator\my documents\visual studio 2005\projects\stringstuff\case.cpp(62) : error C2678: binary '<<' : no operator found which takes a left-hand operand of type 'std:fstream' (or there is no acceptable conversion)

my simple little function looks like this:

Code:

ostream& operator<<(ostream& os, String& str)
{
	os << str.getBuf() << endl;
	return os;
}

where the declaration is:

friend ostream& operator<<(ostream&, const String& str);


Anyone?? Anyone??? I have not the slightest clue.... I hope that's enough information too::

The parameter and/or return types in the declaration are different than in the definition. They must match.

Ok I messed around and did the folllow and as such have no success (story of my life):

Code:

ostream& operator<<(std::ostream& os, String& str)
{
	os << str.getBuf() << endl;
	return os;
}

ofstream& operator<<(std::ofstream& os, String& str)
{
	os << str.getBuf() << endl;
	return os;
}

with a declaration as....................

	void print();
	//friend ostream& operator<<(ostream&, String& str);

};

std::ostream& operator <<(std::ostream& os, String& str);
std::ofstream& operator<<(std::ofstream& os, String& str);
#endif

As usual I have not a clue....

See redefinition below:

Code:

ostream& operator<<(std::ostream& os, String& str)
{
	os << str.getBuf() << endl;
	return os;
}

ofstream& operator<<(std::ofstream& os, String& str)
{
	os << str.getBuf() << endl;
	return os;
}

with a declaration as....................

	void print();
	//friend ostream& operator<<(ostream&, String& str);

};

std::ostream& operator <<(std::ostream& os, String& str);
std::ofstream& operator<<(std::ofstream& os, String& str);
#endif

even without the ofstream& I still get that error: error C2678: binary '<<' : no operator found which takes a left-hand operand of type 'std:fstream' (or there is no acceptable conversion)
Which I really don't know what to do with that.....