What is the difference between the following? [duplicate]

This question already has answers here: Closed 12 years ago.

Possible Duplicate:

Do the parentheses after the type name make a difference with new?

Assuming A is a开发者_Python百科 class properly defined with constructors etc., what is the difference between these?

A *ptrA = new A;
A *ptrA = new A();

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It depends on the definition of A - "a class properly defined with constructors etc" is very unhelpful and impressively vague.

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They are the same