error LNK2001 Visual C++

Question

I compile this code:

class TextBox
{
public: 
struct Caret {int x; int y; int index;};
    static Caret caret;
    // more code...
}

and I got this error

error LNK2001: unresolved external symbol "public: static struct TextBox::Caret TextBox::caret" (?caret@TextBox@@2UCaret@1@A)

What is my mistake

look for "static data members must be defined outside the class in a single translation unit" — Luchian Grigore, Feb 08 '13 at 09:21
You need to initialise static variable in the program outside the class — Subhajit, Feb 08 '13 at 09:24

score 2 · Accepted Answer · answered Feb 08 '13 at 09:21

2

You need to instantiate caret; add this in the source file:

TextBox::Caret TextBox::caret;

answered Feb 08 '13 at 09:21

piwi

1 Answers1