Declaring class objects within a class

Are you looking for this sort of arrangement?

class Trunk {
};

class Foot {
  public:
    Foot(int a) {}
};

class Elephant {
  private:
    Trunk t;
    Foot f1,f2,f3,f4;
    
  public:
    Elephant()
      : f1(1), f2(2), f3(3), f4(4) {
    }
};