Question

I have a class in foo.h containing a static member

class foo {
 public:
  static vector<int> a;
  static void Init() { // Init a }
}

Everything works fine until I have a testing file
foo_test.cpp which is testing class foo. But in the
testing file, the static member a is not visible because
static member is only visible… How do I solve this?

Thanks

Answer 1

You will need to define a, in your cpp file add a line like:

vector<int> foo::a;

Edit: changed the data type to reflect the edit in the question