C++ : constructor initialization list for an array?

Question

I have a basic question. I have a class with a data member : double _mydata[N]. (N is a template parameter). What is the syntax to initialize these data to zero with a constructor initialization list ? Is _mydata({0}) OK according to the C++ standard (and so for all compilers) ?

Thank you very much.

Well, I think you could answer half of your question on your own rather easily since _mydata({0}) wouldn't even compile. — Ed Swangren
– Ed Swangren, Commented May 22, 2012 at 0:52

Seth Carnegie · Accepted Answer · 2012-05-22 00:54:31Z

12

No, prior to C++11 you need to do just this to default-initialise each element of the array:

: _mydata()

The way you have it written won't work.

With C++11 it is more recommended use uniform initialisation syntax:

: _mydata { }

And that way you can actually put things into the array which you couldn't before:

: _mydata { 1, 2, 3 }

edited May 22, 2012 at 0:54

answered May 22, 2012 at 0:48

Seth Carnegie

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