Указатели: циклический сдвиг элементов массива

#include <iostream>
 
int *copy(int *begin, int *end, int *destination) {
  int *copyOfDestination = destination;
  while (begin != end) {
    *destination++ = *begin++;
  }
  return copyOfDestination;
}
 
// ñäâèãàåò ìàññèâ âëåâî íà number ýëåìåíòîâ
void shiftLeft(int *begin, int *end, int number) {
  int *storage = new int[number];
  copy(begin, begin + number, storage);
  for (int *first = begin; first != end - number; ++first) {
    *first = *(first + number);
  }
  copy(storage, storage + number, end - number);
  delete [] storage;
}
 
// ñäâèãàåò ìàññèâ âïðàâî íà number ýëåìåíòîâ
void shiftRight(int *begin, int *end, int number) {
  int *storage = new int[number];
  copy(end - number, end, storage);
  for (int *last = end - 1; last != begin + number - 1; --last) {
    *last = *(last - number);
  }
  copy(storage, storage + number, begin);
  delete [] storage;
}
 
int main(int argc, char **argv) {
  int size = 10;
  int *array = new int[size];
 
  for (int i = 0; i < 10; ++i) {
    std::cout << (array[i] = i) << " ";
  }
  std::cout << std::endl;
  
  shiftLeft(array, array + size / 2, 2);
  shiftRight(array + size / 2, array + size, 2);
    
  for (int i = 0; i < 10; ++i) {
    std::cout << array[i] << " ";
  }
  std::cout << std::endl;
 
  delete [] array;
  std::cin.get();
  return 0;
}