Right way to conditionally initialize a C++ member variable?

Question

I\'m sure this is a really simple question. The following code shows what I\'m trying to do:

class MemberClass {
public:
    MemberClass(int abc){ }
};

clas         


        

Answer 1

Or:

class MemberClass {
public:
    MemberClass(int abc){ }
};

class MyClass {
public:
    MemberClass* m_class;
    MyClass(int xyz) {
        if(xyz == 42)
            m_class = new MemberClass(12);
        else
            m_class = new MemberClass(32);
    }
};

If you somehow still want to keep the same syntax. Member initalization is more efficient though.