friend classes?

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

Code:

---

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

---

How about putting:

Code:

---

class cl2;

---

...above the two definitions?

error: use of undefined type 'cl2'

Code:

---

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;
};

---

I guess it could be a circular definition type thing.

don't type the definitions inline

Hi ,

U need forward declaration of the class cl2.

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

Wrong avaneesh, that won't suffice.

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