70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/*=============================================================================
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This file is part of FLINT.
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FLINT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FLINT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2007 David Harvey, William Hart
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Copyright (C) 2010 Sebastian Pancratz
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******************************************************************************/
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/*
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Demo FLINT program for computing the q-expansion of the delta function.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <gmp.h>
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#include "flint.h"
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#include "fmpz.h"
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#include "arith.h"
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int main(int argc, char* argv[])
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{
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fmpz_t c, n;
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slong N = 0;
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if (argc == 2)
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N = atol(argv[1]);
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if (argc != 2 || N < 1)
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{
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flint_printf("Syntax: delta_qexp <integer>\n");
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flint_printf("where <integer> is the (positive) number of terms to compute\n");
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return EXIT_FAILURE;
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}
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fmpz_init(c);
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fmpz_init(n);
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fmpz_set_si(n, N);
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arith_ramanujan_tau(c, n);
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flint_printf("Coefficient of q^%wd is ", N);
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fmpz_print(c);
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flint_printf("\n");
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fmpz_clear(c);
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fmpz_clear(n);
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return EXIT_SUCCESS;
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}
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