counting input words

any comments for improvement:

/* C++ Primer - 4/e
 *
 * CHAPTER 10 - Associative Containers
 *
 * EXERCISE - 10.7
 * Write a program to count and print the number of times each word
 * occured in the input.
 *
 */

#include <iostream>
#include <string>
#include <vector>
#include <map>

int main()
{
  std::map<std::string, int> word_count;
  std::string aword;
  while( std::cin >> aword )
    {
      ++word_count[aword];
    }

  std::cout << "\n----------------------------------------------------\n";
  for( std::map<std::string, int>::const_iterator iter =
       word_count.begin();
       iter != word_count.end(); ++iter )
    {
      std::cout << iter->first << " occured "
        << iter->second << " times "
        << std::endl;
    }

  return 0;
}

================= OUTPUT =======================

/home/arnuld/programs $ ./a.out
bazarov
Jack
Bux
Bux
Bazaro
Jack
Bux

----------------------------------------------------
Bazaro occured 1 times
Bux occured 3 times
Jack occured 2 times
bazarov occured 1 times
/home/arnuld/programs $

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