How can I announce a Class before it is declared?

Question

I think I need something like a class prototype.

Class First
{
    public:
        int Method1(Second* second); // Error: Undefined class Second
    private:
        int Attribute1;
}
Class Second
{
    public:
        int Method1(First* first);
    private:
        int Attribute2;
}

Thanks in advance.

You want to *declare* a class before it is *defined*. – juanchopanza Sep 05 '14 at 06:03 — juanchopanza, Sep 05 '14 at 06:03

songyuanyao · Accepted Answer · 2015-07-22T01:50:24.507

0

What you need is forward declaration:

class Second;
class First
{
    public:
        int Method1(Second* second);
    private:
        int Attribute1;
};

edited Jul 22 '15 at 01:50

answered Sep 05 '14 at 06:04

songyuanyao

169,198
16
310
405

Just keep in mind: you also can do this with a reference of the class Second. – KimKulling Sep 05 '14 at 06:46

How can I announce a Class before it is declared?

1 Answers1