class example for declaration

class_example.cpp

class House;
class Owner;

class House{
public:
    Owner* my_owner;
    House(Owner* owner){
        my_owner = owner;
    }
    ~House(){}
};

class Owner{
public:
    House* my_house;
    Owner(House* house){
        my_house = house;
    }
    ~Owner(){}
};