CODEWITHSUNDEEP
c++inheritance
Gelldur
Gelldur

Reputation: 11558

Inheriting and good practices

I have few classes 

class A;
class B;
class C;
class D;

Classes B,C,D inherits from A. In my problem i have multiple classes B,C,D and each of them have a static field for example 

static int gold;

Class A is abstract class and it have method getGold();

Of course every class B,C,D has its own static field 

static int gold;

and in every class (B,C,D) i implement in the same way 

getGold()
{
    return gold;
}

It's copy & paste but i don't have idea how make it better.

B,C,D for example

Every object of the same class costs the same so this is why i want to have only one int Of course this is only example instead int i can have there for example class Gold instance :)

Upvotes: 2

Views: 98

Answers (1)

Yakk - Adam Nevraumont
Yakk - Adam Nevraumont

Reputation: 275220

If it does not need to vary, use an enum for the value.

Regardless, return gold is not a bad idea. If it was more complex, you might use the CRTP. A helper template the inherits from A and implements get gold.

You pass B in as a template parameter and then inherit B from it. The methods of the template can static cast this to a B and use B's state.

CRTP is pretty easy to Google.

Remember, return gold is probably best.

Upvotes: 1

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