#include <iostream>
using std::cout;
using std::endl;

#include <algorithm>
#include <iterator> 

int main()
{
   int a[ 10 ] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
   std::ostream_iterator< int > output( cout, " " );

   cout << "Array a contains:\n   ";
   std::copy( a, a + 10, output );

   std::swap_ranges( a, a + 5, a + 5 );

   std::copy( a, a + 10, output );

   cout << endl;
   return 0;
}
