struct database
{ person * * data;
  int size;
  int nextfreeslot;

  database()
  { size = 100;
    nextfreeslot = 0;
    data = new person * [size]; }

  void makeitgrow();

  void insert(person *); // put it in next free place for me

  person * findoldest();

  void put(int pos, person * ptr); // check pos is valid

  person * get(int pos); // also checks
};

person * database::get(int pos)
{ 
  return data[pos]; }