zero.cpp 1.09 KB
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/*
 * <one line to give the library's name and an idea of what it does.>
 * Copyright (C) 2019  <copyright holder> <email>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "zero.h"

ostream& operator<<(ostream& os, const zero& z)
{
    if (z.is_non_zero())
        os << "boundary: " << z.get_x();
    else {
        os << "Zero of the function: " << z.get_x() << ", derivative is ";
        if (z.is_neg())
            os << " negative";
        else
            os << " positive";
    }
    return os;
}