Overloading the insertion operator

[roberts]

Trying to do some state reporting. I'm running into accessibility issues trying to print out objects.

The class:

class Triangle
{
private:
	const Point *vertex_ref[3];
public:
	friend ostream& operator<<(ostream &, const Triangle &);
}

The code in triangle.cpp:

ostream& operator<<(ostream &outstream, const Triangle &tri)
{
	outstream << tri.vertex_ref[0]; 
}

The code in point.cpp

ostream &operator<<( ostream &outstream, const Point *p)
{
	outstream << p->x << ", " << p->y << ", " << p->z;
	return outstream;

}

It's telling me I can't access vertex_ref[0] in triangle.cpp, even though the member function is declared as friend. Not sure what is wrong.

[o1vk4iN6]

Syntax is good other than you are missing a semi-colon at the end of your class define. Compiles fine for me.

class Triangle
{

}; // semi-colon

You can also do this just to keep it nice and tiddy:

ostream &operator<<( ostream &outstream, const Point *p)
{ 
     return outstream << p->x << ", " << p->y << ", " << p->z; 
}