How to initialize all elements in an array to the same number in C++

Question

I\'m trying to initialize an int array with everything set at -1.

I tried the following, but it doesn\'t work. It only sets the first value at -1.

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Answer 1

I had the same question and I found how to do, the documentation give the following example :

std::array a1{ {1, 2, 3} }; // double-braces required in C++11 (not in C++14)

So I just tried :

std::array a1{ {1} }; // double-braces required in C++11 (not in C++14)

And it works all elements have 1 as value. It does not work with the = operator. It is maybe a C++11 issue.