I have a class:

class C{
public:
//Omitted

private:
    shared_ptr<X> anArray[2];
};

and X looks like:

class X{
public:
    X(); //default constructor used by the above array declaration?
private:
    std::unordered_map<int, double> a;
};

After I create my C class, I access one of the two shared_ptr objects in the array, however, the memory doesn't seem to be initialised. By this I mean X::a doesn't have any valid state.

I thought the array declaration in C would create the shared_ptr<X>s AND the X objects?

Is there something I should be explicitly doing in the X default constructor?