#include <iostream>
struct A {
  int size = 0;
  int* array = nullptr;
  A(int sz) : size(sz) {
     array = new int[size];
  }
  virtual ~A(){
    if(array) delete[] array;
    array = nullptr;
  }
};

void TestA(const A* const & ptr) {
  int* tmp = ptr->array;
  tmp[0] = 2;
  tmp[1] = 3;
}

int main() {
  A a(2);
  a.array[0] = 0;
  a.array[1] = 1;
  std::cout << "a.array[0] = " << a.array[0] << " a.array[1] = " << a.array[1] << std::endl; 
  TestA(&a);
  std::cout << "a.array[0] = " << a.array[0] << " a.array[1] = " << a.array[1] << std::endl; 
}