Allocating struct with variable length array member

Question

I know I can do new char[n] to create an array of n chars. This works even when n is not a compile time constant.

But lets say

Answer 1

Let's keep things short and sweet in C++ using std::vector.

struct Test
{
   std::size_t size;
   char *a;  // Modified to pointer

   Test( int size ): size(size), a(new char[size+1])
   {}
};

std::vector objects(numberOfObjectsRequired,argumentToTheConstructor);