Class in a class (C++)

Lets say I have this following class:

class Settings {
public:
  Settings(char *filename);
  ~Settings();
protected:
  class Anotherclass anotherclass;
};

Upon the Constructor call 'Settings' it says error C2512: '' : no appropriate default constructor available. How do I get a class to be inside another class?

Remove that 'class' keyword, it's wrong.

If Anotherclass doesn't have a default constructor, you'll have to call one of its explicit constructors in the Settings's constructor initializer list.