From c01880ba9cfdeb2677eee9b92ee10507070eb86e Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@gmail.com>
Date: Tue, 19 Oct 2010 01:12:57 -0400
Subject: Support std::complex<T>.

---
 tests/Complex.cpp | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 tests/Complex.cpp

(limited to 'tests/Complex.cpp')

diff --git a/tests/Complex.cpp b/tests/Complex.cpp
new file mode 100644
index 0000000..df517b0
--- /dev/null
+++ b/tests/Complex.cpp
@@ -0,0 +1,63 @@
+/*************************************************************************
+ * Copyright (C) 2010 Tavian Barnes <tavianator@gmail.com>               *
+ *                                                                       *
+ * This file is part of The vZ Test Suite.                               *
+ *                                                                       *
+ * The vZ Test Suite 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.                       *
+ *                                                                       *
+ * The vZ Test Suite 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 <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+#include "vZ.hpp"
+#include <complex>
+#include <cmath>
+#include <cstdlib>
+#include <iostream>
+#include <iomanip>
+
+// y' = -y (y == C*exp(t))
+std::complex<double>
+f(double t, std::complex<double> y)
+{
+  return y;
+}
+
+int
+main()
+{
+  vZ::GenericDP45Integrator<std::complex<double> > integrator(f);
+  integrator.tol(1e-6)
+            .y(std::complex<double>(1.0, 0.0))
+            .x(0.0)
+            .h(0.06);
+
+  integrator.integrate(2.0);
+
+  std::complex<double> actual = integrator.y();
+  std::complex<double> expected(std::exp(2.0), 0.0);
+
+  std::cout << std::setprecision(10)
+            << "Numerical:  " << actual << std::endl
+            << "Expected:   " << expected  << std::endl
+            << "h:          " << integrator.h() << std::endl
+            << "Iterations: " << integrator.iterations() << std::endl
+            << "Rejections: " << integrator.rejections() << std::endl;
+
+  double error = std::abs(expected - actual)/std::abs(expected);
+  if (error > 6.0e-7) {
+    std::cerr << "Error:      " << 100.0*error << "%" << std::endl;
+    return EXIT_FAILURE;
+  } else {
+    std::cout << "Error:      " << 100.0*error << "%" << std::endl;
+    return EXIT_SUCCESS;
+  }
+}
-- 
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