c++ Base class reaching subclass variable

Question

I have a c++ problem where I need to move my derived class's functions to the base class to "clean up" my code. This is the code that I want to move:

double Resistor::getVolt() { if (connection_a->getCharge() > connection_b->getCharge()) return connection_a->getCharge() - connection_b->getCharge(); else return connection_b->getCharge() - connection_a->getCharge(); } double Resistor::getCurr() { if (connection_a->getCharge() > connection_b->getCharge()) return (connection_a->getCharge() - connection_b->getCharge())/resistance; else return (connection_b->getCharge() - connection_a->getCharge())/resistance; }

I need to move all this and still reach the variables connection_a & connection_b without making the private.

Good. What are you waiting for?

user93353
– user93353

2013-06-25 16:45:03 +00:00
Commented Jun 25, 2013 at 16:45 — user93353
– user93353, Commented Jun 25, 2013 at 16:45

Lefteris E · Accepted Answer · 2013-06-25 18:38:48Z

class Component{ protected: Component *connection_a, *connection_b; virtual double getCharge(); public: virtual ~Component(); }; class Resistor : public Component{ public: virtual double getVolt(); virtual double getCurr(); virtual ~Resistor(); };

From getVolt() you are free to read all non-private fields of the parent. From the baseclass you are not allowed access to any of the derived class's variables directly. You could however call virtual methods offered by the baseclass that are overwritten in the derrived class knowing that the ones that will be called depends on the instance's class type.

Collectives™ on Stack Overflow

c++ Base class reaching subclass variable

1 Answer 1

Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Related