I can't find partial_sum_copy in the library.
Maybe it's better to use another algorithm in the example.

24.5  Stream iterators                          [lib.stream.iterators]

2 [Example:
  partial_sum_copy(istream_iterator<double, char>(cin),
    istream_iterator<double, char>(),
    ostream_iterator<double, char>(cout, "\n"));
  reads a file containing floating point numbers from  cin,  and  prints
  the partial sums onto cout.   --end example]
---
[ comp.std.c++ is moderated.  To submit articles: try just posting with      ]
[ your news-reader.  If that fails, use mailto:std-c++@ncar.ucar.edu         ]
[ FAQ:      http://reality.sgi.com/employees/austern_mti/std-c++/faq.html    ]
[ Policy:   http://reality.sgi.com/employees/austern_mti/std-c++/policy.html ]
[ Comments? mailto:std-c++-request@ncar.ucar.edu                             ]