54 lines
2.2 KiB
C++
54 lines
2.2 KiB
C++
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/********************************************************
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* ██████╗ ██████╗████████╗██╗
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* ██╔════╝ ██╔════╝╚══██╔══╝██║
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* ██║ ███╗██║ ██║ ██║
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* ██║ ██║██║ ██║ ██║
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* ╚██████╔╝╚██████╗ ██║ ███████╗
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* ╚═════╝ ╚═════╝ ╚═╝ ╚══════╝
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* Geophysical Computational Tools & Library (GCTL)
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*
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* Copyright (c) 2023 Yi Zhang (yizhang-geo@zju.edu.cn)
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*
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* GCTL is distributed under a dual licensing scheme. You can redistribute
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* it and/or modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, either version 2
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* of the License, or (at your option) any later version. You should have
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* received a copy of the GNU Lesser General Public License along with this
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* program. If not, see <http://www.gnu.org/licenses/>.
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*
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* If the terms and conditions of the LGPL v.2. would prevent you from using
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* the GCTL, please consider the option to obtain a commercial license for a
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* fee. These licenses are offered by the GCTL's original author. As a rule,
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* licenses are provided "as-is", unlimited in time for a one time fee. Please
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* send corresponding requests to: yizhang-geo@zju.edu.cn. Please do not forget
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* to include some description of your company and the realm of its activities.
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* Also add information on how to contact you by electronic and paper mail.
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******************************************************/
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#include "../lib/algorithm.h"
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using namespace gctl;
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affvar func(const affvar &x1, const affvar &x2)
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{
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// y(x1, x2) = x1*x2 + 2*cos(x1) - 3*sin(x2)
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// dy/dx1 = x2 - 2*sin(x1)
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// dy/dx2 = x1 - 3*cos(x2)
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affvar y = x1*x2 + 2.0*cos(x1) - 3.0*sin(x2);
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return y;
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}
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int main(int argc, char *argv[])
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{
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affvar x1 = 2.0;
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affvar x2 = 3.0;
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affvar y;
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y.var({&x1, &x2}, x1);
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y = func(x1, x2);
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std::cout << y.val() << " " << y.der() << "\n";
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y.var({&x1, &x2}, x2);
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y = func(x1, x2);
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std::cout << y.val() << " " << y.der() << "\n";
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return 0;
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}
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