#include <iostream>
#include <malloc.h> // for malloc() and free() calls below
using namespace std;

int main() 
{
  void print_array(int* x, int length);
  int* arr1 = new int[3];
  int* arr2 = (int*) malloc(3*sizeof(int));
  for (int i=0; i<3; i++) {
    arr1[i] = i;
    arr2[i] = i*2;
  }
  print_array(arr1, 3);
  print_array(arr2, 3);
  delete[] arr1; // made with new, must use delete[]
  free(arr2);    // made with malloc, must use free()
  return 0;
}

void print_array(int* x, int length)
{
  cout << "Printing array:" << endl;
  for (int i=0; i<length; i++) {
    cout << *x++ << " ";
  }
  cout << endl;
}