12.26.cpp

#include <string>
#include <iostream>
#include <memory>
using std::string;
using std::cin; using std::cout; using std::endl;

int main() {
  std::allocator<string> alloc;
  constexpr size_t n = 10;  // capacity

  auto const p = alloc.allocate(n);  //string *const p
  string s;
  auto q = p;  //string *q
  while (cin >> s && q != p + n)
    alloc.construct(q++, s);

  const size_t sz = q - p;  // size

  for (auto pos = p; pos != q; ++pos)
    std::cout << *pos << std::endl;

  while (q != p)
    alloc.destroy(--q);
  alloc.deallocate(p, n);

/**
  string *const p = new string[n];
  string s;
  string *q = p;
  while (cin >> s && q != p + n)
    *q++ = s;
  const size_t size = q - p;
  // use the array
  delete[] p;
/**/

  return 0;
}