c++ initial value of dynamic array

Question

I need to dynamically create an array of integer. I've found that when using a static array the syntax

int a [5]={0};

initializes correctly the value of all elements to 0.

Is there a way to do something similar when creating a dynamic array like

int* a = new int[size];

without having to loop over all elements of the a array? or maybe assigning the value with a for loop is still the optimal way to go? Thanks

Answer 1

Sure, just use () for value-initialization:

 int* ptr = new int[size]();

(taken from this answer to my earlier closely related question)