diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/Euler.cpp | 18 | ||||
| -rw-r--r-- | tests/Midpoint.cpp | 20 | ||||
| -rw-r--r-- | tests/RK4.cpp | 20 |
3 files changed, 47 insertions, 11 deletions
diff --git a/tests/Euler.cpp b/tests/Euler.cpp index 5666cd8..0a6e28e 100644 --- a/tests/Euler.cpp +++ b/tests/Euler.cpp @@ -2,6 +2,7 @@ #include <cmath> #include <cstdlib> #include <iostream> +#include <iomanip> // y' = y (y == C*exp(t)) double @@ -18,8 +19,19 @@ main() integrator.integrate(2.0); - std::cout << integrator.y() << std::endl - << std::exp(2.0) << std::endl; + double actual = integrator.y(); + double expected = std::exp(2.0); - return EXIT_SUCCESS; + std::cout << std::setprecision(10) + << "Numerical: " << actual << std::endl + << "Expected: " << expected << std::endl; + + double error = std::fabs(expected - actual)/expected; + if (error > 0.01) { + std::cerr << "Error: " << 100.0*error << "%" << std::endl; + return EXIT_FAILURE; + } else { + std::cout << "Error: " << 100.0*error << "%" << std::endl; + return EXIT_SUCCESS; + } } diff --git a/tests/Midpoint.cpp b/tests/Midpoint.cpp index aea1885..9be7bb7 100644 --- a/tests/Midpoint.cpp +++ b/tests/Midpoint.cpp @@ -2,6 +2,7 @@ #include <cmath> #include <cstdlib> #include <iostream> +#include <iomanip> // y' = y (y == C*exp(t)) double @@ -14,12 +15,23 @@ int main() { vZ::MidpointIntegrator integrator(f); - integrator.y(1.0).x(0.0).h(0.02); + integrator.y(1.0).x(0.0).h(0.01); integrator.integrate(2.0); - std::cout << integrator.y() << std::endl - << std::exp(2.0) << std::endl; + double actual = integrator.y(); + double expected = std::exp(2.0); - return EXIT_SUCCESS; + std::cout << std::setprecision(10) + << "Numerical: " << actual << std::endl + << "Expected: " << expected << std::endl; + + double error = std::fabs(expected - actual)/expected; + if (error > 3.4e-5) { + std::cerr << "Error: " << 100.0*error << "%" << std::endl; + return EXIT_FAILURE; + } else { + std::cout << "Error: " << 100.0*error << "%" << std::endl; + return EXIT_SUCCESS; + } } diff --git a/tests/RK4.cpp b/tests/RK4.cpp index 8e0ca0a..7165c76 100644 --- a/tests/RK4.cpp +++ b/tests/RK4.cpp @@ -2,6 +2,7 @@ #include <cmath> #include <cstdlib> #include <iostream> +#include <iomanip> // y' = y (y == C*exp(t)) double @@ -14,12 +15,23 @@ int main() { vZ::RK4Integrator integrator(f); - integrator.y(1.0).x(0.0).h(0.04); + integrator.y(1.0).x(0.0).h(0.01); integrator.integrate(2.0); - std::cout << integrator.y() << std::endl - << std::exp(2.0) << std::endl; + double actual = integrator.y(); + double expected = std::exp(2.0); - return EXIT_SUCCESS; + std::cout << std::setprecision(10) + << "Numerical: " << actual << std::endl + << "Expected: " << expected << std::endl; + + double error = std::fabs(expected - actual)/expected; + if (error > 1.7e-10) { + std::cerr << "Error: " << 100.0*error << "%" << std::endl; + return EXIT_FAILURE; + } else { + std::cout << "Error: " << 100.0*error << "%" << std::endl; + return EXIT_SUCCESS; + } } |