Why is it that for user defined types when creating an array of objects every element of this array is initialized with the default constructor, but when I create an array of a built-in type that isn't the case?

And second question: Is it possible to specify default value to be used while initializing elements in the array? Something like this (not valid): 

```
char* p = new char[size]('\0');

```

And another question in this topic while I'm with arrays. I suppose that when creating an array of user defined type, every element of this array will be initialized with default value. Why is this?

If arrays for built in types do not initialize their elements with their defaults, why do they do it for User Defined Types?

Is there a way to avoid/circumvent this default construction somehow? It seems like bit of a waste if I for example have created an array with size 10000, which forces 10000 default constructor calls, initializing data which I will (later on) overwrite anyway. 

I think that behaviour should be consistent, so either every type of array should be initialized or none. And I think that the behaviour for built-in arrays is more appropriate.