Why don't static member variables play well with the ternary operator?

Question

Here\'s the deal. I have a static class which contains several static functions used for getting input. The class contains a private static member variable for indicating wh

Answer 1

class Test {
    static const int GOOD = 0;
    static const int BAD = 1;
};

These are only declarations; they are not definitions. You need to provide definitions of the static member variables, outside of the definition of the class, in one of your .cpp files:

const int Test::GOOD;
const int Test::BAD;

Alternatively, for integer constants, it is often more convenient to use an enum:

class Test {
    enum { 
        GOOD = 0,
        BAD = 1 
    };
};