Question

I come from a java background and there’s something I could do in Java that I need to do in C++, but I’m not sure how to do it.

I need to declare an array, but at the moment I don’t know the size. Once I know the size, then I set the size of the array. I java I would just do something like:

int [] array;

then

array = new int[someSize];

How do I do this in C++?

Answer 1

In C++ you can do:

int *array; // declare a pointer of type int.
array = new int[someSize]; // dynamically allocate memory using new

and once you are done using the memory..de-allocate it using delete as:

delete[]array;