e(f<SUB>1</SUB>,<SPAN STYLE="visibility:hidden"><SUB>n-</SUB></SPAN> buf<SUB>2</SUB>,<SPAN STYLE="visibility:hidden"><SUB>n-</SUB></SPAN> ios_base::in);

    <SPAN CLASS="comment">// Close each output sequence, in order:</SPAN>
    boost::iostreams::close(f<SUB>1</SUB>,<SPAN STYLE="visibility:hidden"><SUB>n-</SUB></SPAN> buf<SUB>2</SUB>,<SPAN STYLE="visibility:hidden"><SUB>n-</SUB></SPAN> ios_base::out);
    boost::iostreams::close(f<SUB>2</SUB>,<SPAN STYLE="visibility:hidden"><SUB>n-</SUB></SPAN> buf<SUB>3