ALL: Add flint

external/flint-2.4.3/examples/stirling_matrix.cpp

@@ -0,0 +1,65 @@
+/*=============================================================================
+
+    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) 2011 Fredrik Johansson
+    Copyright (C) 2013 Tom Bachmann (C++ adaptation)
+
+******************************************************************************/
+
+/*
+    Demo FLINT program for generating Stirling number matrices
+    and inverting them.
+*/
+
+#include <cstdio>
+#include "fmpz_matxx.h"
+#include "fmpzxx.h"
+#include "arithxx.h"
+
+using namespace std;
+using namespace flint;
+
+int main(int argc, char* argv[])
+{
+    if (argc != 2)
+    {
+        flint_printf("Syntax: stirling_matrix <integer>\n");
+        return 1;
+    }
+
+    slong n = atoi(argv[1]);
+
+    fmpz_matxx S1(stirling_matrix_1(n, n)), S2(stirling_matrix_2(n, n));
+
+    flint_printf("S1 [Stirling numbers of 1st kind]:\n");
+    print_pretty(S1);
+    flint_printf("\n\n");
+
+    flint_printf("S2 [Stirling numbers of 2nd kind]:\n");
+    print_pretty(S2);
+    flint_printf("\n\n");
+
+    flint_printf("S1 * S2:\n");
+    print_pretty(S1*S2);
+    flint_printf("\n\n");
+
+    return 0;
+}