// Class members (data & methods) can be public/private/protected.
// The default is private.
//
// public: anyone can access them
// private: nobody except other methods of this class can access them
// protected: can be accessed by this class, and by immediately derived class

class Foo {		    // A class, with a variable of each type
  public:
    int pub;		    // I’m public!
  private:
    int priv;		    // I’m private!
  protected:
    int prot;		    // I’m a little teapot, short & stout.
};

int main() {
    Foo f;

    f.pub = 1;		    // great
    // f.priv = 2;	    // nope
    // f.prot = 2;	    // nope

    return f.pub;
}