Undefined Reference to class static member in static member

Question

I am creating a linked list with self referential class in C++ and I want to have a static pointer of the type Item (Item is the class name) named \"startPointer\" so that w

Answer 1

You have to define your static member like this:

Item* Item::startPointer = nullptr; // or = NULL; if your cpp version is below c++11

Write such a line in a single compilation unit (cpp file), otherwise the member is just declared.