diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/Makefile.am | 4 | ||||
| -rw-r--r-- | tests/RKF45.cpp | 39 |
2 files changed, 42 insertions, 1 deletions
diff --git a/tests/Makefile.am b/tests/Makefile.am index cab6d98..f6ad25e 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -24,7 +24,8 @@ check_PROGRAMS = Euler-test \ Heun-test \ RK4-test \ HE12-test \ - BS23-test + BS23-test \ + RKF45-test TESTS = $(check_PROGRAMS) Euler_test_SOURCES = Euler.cpp @@ -33,3 +34,4 @@ Heun_test_SOURCES = Heun.cpp RK4_test_SOURCES = RK4.cpp HE12_test_SOURCES = HE12.cpp BS23_test_SOURCES = BS23.cpp +RKF45_test_SOURCES = RKF45.cpp diff --git a/tests/RKF45.cpp b/tests/RKF45.cpp new file mode 100644 index 0000000..8b87216 --- /dev/null +++ b/tests/RKF45.cpp @@ -0,0 +1,39 @@ +#include "vZ.hpp" +#include <cmath> +#include <cstdlib> +#include <iostream> +#include <iomanip> + +// y' = y (y == C*exp(t)) +double +f(double t, double y) +{ + return y; +} + +int +main() +{ + vZ::RKF45Integrator integrator(f); + integrator.tol(1e-6).y(1.0).x(0.0).h(0.06); + + integrator.integrate(2.0); + + double actual = integrator.y(); + double expected = std::exp(2.0); + + std::cout << std::setprecision(10) + << "Numerical: " << actual << std::endl + << "Expected: " << expected << std::endl + << "h: " << integrator.h() << std::endl + << "rejections: " << integrator.rejections() << std::endl; + + double error = std::fabs(expected - actual)/expected; + if (error > 1.5e-6) { + std::cerr << "Error: " << 100.0*error << "%" << std::endl; + return EXIT_FAILURE; + } else { + std::cout << "Error: " << 100.0*error << "%" << std::endl; + return EXIT_SUCCESS; + } +} |