ismpq.cc
上传用户:qaz666999
上传日期:2022-08-06
资源大小:2570k
文件大小:1k
- /* operator>> -- C++-style input of mpq_t.
- Copyright 2003 Free Software Foundation, Inc.
- This file is part of the GNU MP Library.
- The GNU MP Library is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 3 of the License, or (at your
- option) any later version.
- The GNU MP Library is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
- License for more details.
- You should have received a copy of the GNU Lesser General Public License
- along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
- #include <cctype>
- #include <iostream>
- #include <string>
- #include "gmp.h"
- #include "gmp-impl.h"
- using namespace std;
- istream &
- operator>> (istream &i, mpq_ptr q)
- {
- if (! (i >> mpq_numref(q)))
- return i;
- char c = 0;
- i.get(c); // start reading
- if (c == '/')
- {
- // skip slash, read denominator
- i.get(c);
- return __gmpz_operator_in_nowhite (i, mpq_denref(q), c);
- }
- else
- {
- // no denominator, set 1
- q->_mp_den._mp_size = 1;
- q->_mp_den._mp_d[0] = 1;
- if (i.good())
- i.putback(c);
- else if (i.eof())
- i.clear();
- }
- return i;
- }