C++ Related Classes Problems

[Trinithis]

I can't get the following code to compile:

class Foo {
public:
Bar* bar;
Foo() {
bar = NULL;
}
};

class Bar {
public:
Foo* foo;
Bar() {
foo = NULL;
}
};

How can I achieve this effect?

[Twey]

You need to use a forward declaration:class Bar;

class Foo {
public:
Bar* bar;
Foo() {
bar = 0;
}
};

class Bar {
public:
Foo* foo;
Bar() {
foo = 0;
}
};

[Trinithis]

Thanks. I tried that a first and thought I was doing something wrong because it didn't work. As it turns out, I am working with generics, and I needed a little extra:
template <class T> class Iterator;
Seems to work. For now . . .