Accessing member objects from another member object within the same class

Question

Let's say I have the following C++ code:

class Circuit {
    public:
    Properties circuit_prop;
    Library tech_libray;
    InstanceList instances;
}

Properties , Library and InstanceList are classes defined in my code. And for example the class InstanceList has a member function called build . Is it possible to access the member object circuit_prop or tech_library without passing them as parameter to build ? What would be the best approach to solve this problem?

Answer 1

No, this is not possible, because an InstanceList could just as well exist outside of Circuit .

If you have a method that needs to access various members, it should go into the class that has those members - in your case, Circuit .

Alternatively, InstanceList needs to know the Circuit it belongs to, in which case it can access the members via Circuit 's public interface.

Answer 2

Just because classes are associate members of the same class does not mean that they can freely access each others member objects. I would say making circuit_prop and tech_library members of InstanceList would be better than having them all members of the same class. This way you can get Circuit to access them freely from a get set set up or by making Circuit a friend class of InstanceList

Answer 3

circuit_prop或tech_library范围仅在Circuit类中，最好在Circuit内部创建一个方法，该方法具有单独类所需的所有公共访问权限。