1  # include "mailsystem.h"
  2  # include "telephone.h"
  3  # include "connection.h"
  4  
  5  int main()
  6  {
  7     const int MAILBOX_COUNT = 20;
  8     MailSystem system(MAILBOX_COUNT);
  9     Telephone p;
 10     Connection c(system, p);
 11     p.run(c);
 12     return 0;
 13  }