Add the midpoint method.

2 files changed, 29 insertions, 2 deletions

diff --git a/tests/Makefile.am b/tests/Makefile.am
index a3d5a77..5f94aab 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -19,7 +19,9 @@
 
 INCLUDES = -I$(top_srcdir)/src
 
-check_PROGRAMS = Euler-test
+check_PROGRAMS = Euler-test                                                    \
+                 Midpoint-test
 TESTS          = $(check_PROGRAMS)
 
-Euler_test_SOURCES = Euler.cpp
+Euler_test_SOURCES    = Euler.cpp
+Midpoint_test_SOURCES = Midpoint.cpp
diff --git a/tests/Midpoint.cpp b/tests/Midpoint.cpp
new file mode 100644
index 0000000..aea1885
--- /dev/null
+++ b/tests/Midpoint.cpp
@@ -0,0 +1,25 @@
+#include "vZ.hpp"
+#include <cmath>
+#include <cstdlib>
+#include <iostream>
+
+// y' = y (y == C*exp(t))
+double
+f(double t, double y)
+{
+  return y;
+}
+
+int
+main()
+{
+  vZ::MidpointIntegrator integrator(f);
+  integrator.y(1.0).x(0.0).h(0.02);
+
+  integrator.integrate(2.0);
+
+  std::cout << integrator.y() << std::endl
+            << std::exp(2.0)  << std::endl;
+
+  return EXIT_SUCCESS;
+}