88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/*
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test_eval.h
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Copyright (C) 2011 and later Lubomir I. Ivanov (neolit123 [at] gmail)
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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/*
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test horner.h for complex numbers and other related headers
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gcc -W -Wall -Wextra -ansi pedantic
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cl /W4 /Za
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reduced precisions for ansi c
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*/
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#include "stdio.h"
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#include "complex_number.h"
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#include "horner.h"
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#include "durand_kerner.h"
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int main(void)
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{
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cmath_uint16_t i = 0;
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cnum_t y[] = {2, -6, 2, -1};
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cnum_s cy[] = {{2, 0}, {-6, 0}, {2, 0}, {-1, 0}};
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cnum_t fx = horner_eval(y, 5, poly_order(y));
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cnum_s fcx = horner_eval_c(cy, _CNUM(5, 0), poly_order(y));
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cnum_t dk_coeff[] = {12, -7, 0.001, 0, 3, -5};
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cnum_s dk_roots[5];
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cnum_s dk_coeff_c[] = {{12, 0}, {-7, 0}, {0.001, 0}, {0, 0}, {3, 0}, {-5, 0}};
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cnum_s dk_roots_c[5];
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durand_kerner(dk_coeff, dk_roots, poly_order(dk_coeff));
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durand_kerner_c(dk_coeff_c, dk_roots_c, poly_order(dk_coeff_c));
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/* */
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#ifdef _CMATH_ANSI
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puts("\n\nansi c is: on");
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#else
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puts("\n\nansi c is: off");
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#endif
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/* */
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puts("\n\nevaluate polynomials:\n");
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printf("* y[]: %.15f\n", (double)fx);
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printf("* cy[]: %.15f \t %.15f*i\n", (double)fcx.r, (double)fcx.i);
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/* */
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puts("\nfind roots:");
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puts("\n* dk_coeff[]:");
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i = 0;
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while (i < poly_order(dk_coeff))
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{
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printf("root[%2d]: %.15f \t % .15f*i\n",
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i+1, (double)dk_roots[i].r, (double)dk_roots[i].i);
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i++;
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}
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i = 0;
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puts("\n* dk_coeff_c[]:");
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while (i < poly_order(dk_coeff_c))
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{
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printf("root[%2d]: %.15f \t % .15f*i\n",
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i+1, (double)dk_roots_c[i].r, (double)dk_roots_c[i].i);
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i++;
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}
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return 0;
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}
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