// This code illustrates the use of a static member variable.
// It’s not supposed to compile.

#include <iostream>

using namespace std;

class Foo {
  public:
    Foo() { cout << "Hi there " << counter++ << '\n'; }

  private:
    static int counter;
};

int main() {
    Foo f;
}

// int Foo::counter;			// uncomment to compile