friend classes?

[wey97]

How in the hell can you use two classes inside each other in the
same file?
I could have sworn this used to work:

class cl1
{
	public:
	int i;
	cl1(cl2 c2){i = c2.i;}
	friend class cl2;
};

// error: missing ')' before identifier c2

class cl2
{
	public:
	int i;
	cl2(cl1 c1){i = c1.i;}
	friend class cl1;
};

// this is fine

[parksie]

How about putting:

class cl2;

...above the two definitions?

[wey97]

error: use of undefined type 'cl2'

class cl2;

class cl1
{
	public:
	int i;
	cl1(cl2 c2){i = c2.i;}
	friend class cl2;
};

class cl2
{
	public:
	int i;
	cl2(cl1 c1){i = c1.i;}
	friend class cl1;
};

[wey97]

I guess it could be a circular definition type thing.

[kedaman]

don't type the definitions inline

[avaneesh]

Hi ,

U need forward declaration of the class cl2.

Just write "class cl2" before class cl1 declaration.
Try it..

[CornedBee]

Wrong avaneesh, that won't suffice.

What keda said. Put the implementations of cl1's methods after the definition of cl2.