Question

With the following code I want accomplish two different values for intA, but I get:

clsA a=1? 1
clsB a=2? 1

//Code
#include <iostream>
using namespace std;
class clsA {
    static const int intA = 1; 
public:
    virtual int get_a() { return intA; }
};
class clsB: public clsA { 
    static const int intA = 2;   
}; 
int main() { 
    clsA a; clsB b;
    cout << "clsA intA =  " << a.get_a() << endl;
    cout << "clsB intA =  " << b.get_a() << endl;
}

How can I get intA=1 for object a and intA=2 for object b?
Thanks for the reaction,
André

Answer 1

Try this:

class clsB: public clsA {
    static const int intA = 2;
public:
    virtual int get_a() { return intA; }
};

The reason the other didn’t work is that there literally existed no method clsB::get_a(). There only existed a vtable entry to which such a method might have been attached. The above attaches the method.