Small question about classes

[pel1993]

i am looking at code for a custom vector class and i see something like this

  ClassName a;
  ClassName d{5};
  cout<< d

what is {5} and what the difference with d(5) the intent is to store one element ' 5' into a vector like class

thanks

[LB]

It is brace initialization.

http://en.cppreference.com/w/cpp/language/aggregate_initialization

It was added in C++11 and is preferred in many cases.

[pel1993]

thanks just starting to learn all the new featured on c++11