ALL: Add flint

external/flint-2.4.3/examples/delta_qexp.cpp

@@ -0,0 +1,59 @@
+/*=============================================================================
+
+    This file is part of FLINT.
+
+    FLINT 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 2 of the License, or
+    (at your option) any later version.
+
+    FLINT 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 FLINT; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+
+=============================================================================*/
+/******************************************************************************
+
+    Copyright (C) 2007 David Harvey, William Hart
+    Copyright (C) 2010 Sebastian Pancratz
+    Copyright (C) 2013 Tom Bachmann (C++ adaptation)
+
+******************************************************************************/
+
+/*
+    Demo FLINT program for computing the q-expansion of the delta function.
+*/
+
+#include <iostream>
+#include <cstdlib>
+#include "fmpzxx.h"
+#include "arithxx.h"
+
+using namespace flint;
+using namespace std;
+
+int main(int argc, char* argv[])
+{
+    slong N = 0;
+
+    if (argc == 2)
+        N = atol(argv[1]);
+
+    if (argc != 2 || N < 1)
+    {
+        flint_printf("Syntax: delta_qexp <integer>\n");
+        flint_printf("where <integer> is the (positive) number of terms to compute\n");
+        return 1;
+    }
+
+    std::cout << "Coefficient of q^" << N << " is "
+              << ramanujan_tau(fmpzxx(N)) << '\n';
+
+    return 0;
+}
+