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/* Test of atan2() function.
Copyright (C) 2010-2017 Free Software Foundation, Inc.
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 <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2010. */
#include <config.h>
#include <math.h>
#include "signature.h"
SIGNATURE_CHECK (atan2, double, (double, double));
#include "macros.h"
volatile double x;
volatile double y;
double z;
int
main ()
{
/* A particular value in the first quadrant. */
x = 0.6;
y = 0.8;
z = atan2 (y, x);
ASSERT (z >= 0.9272952180 && z <= 0.9272952181);
/* A particular value in the second quadrant. */
x = -0.6;
y = 0.8;
z = atan2 (y, x);
ASSERT (z >= 2.214297435 && z <= 2.214297436);
/* A particular value in the third quadrant. */
x = -0.6;
y = -0.8;
z = atan2 (y, x);
ASSERT (z >= -2.214297436 && z <= -2.214297435);
/* A particular value in the fourth quadrant. */
x = 0.6;
y = -0.8;
z = atan2 (y, x);
ASSERT (z >= -0.9272952181 && z <= -0.9272952180);
return 0;
}
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