From c2ebbd269b354ba80db074deecd5d0f46db39248 Mon Sep 17 00:00:00 2001 From: Dmitry Kokorin Date: Tue, 15 Mar 2016 23:49:09 +0300 Subject: [PATCH] space_age: initial commit --- cpp/space-age/CMakeLists.txt | 52 ++++++++++++++++++++ cpp/space-age/README.md | 56 ++++++++++++++++++++++ cpp/space-age/space_age_test.cpp | 81 ++++++++++++++++++++++++++++++++ 3 files changed, 189 insertions(+) create mode 100644 cpp/space-age/CMakeLists.txt create mode 100644 cpp/space-age/README.md create mode 100644 cpp/space-age/space_age_test.cpp diff --git a/cpp/space-age/CMakeLists.txt b/cpp/space-age/CMakeLists.txt new file mode 100644 index 0000000..95c7011 --- /dev/null +++ b/cpp/space-age/CMakeLists.txt @@ -0,0 +1,52 @@ +# Get the exercise name from the current directory +get_filename_component(exercise ${CMAKE_CURRENT_SOURCE_DIR} NAME) + +# Basic CMake project +cmake_minimum_required(VERSION 2.8.11) + +# Name the project after the exercise +project(${exercise} CXX) + +# Locate Boost libraries: unit_test_framework, date_time and regex +set(Boost_USE_STATIC_LIBS ON) +set(Boost_USE_MULTITHREADED ON) +set(Boost_USE_STATIC_RUNTIME OFF) +find_package(Boost 1.55 REQUIRED COMPONENTS unit_test_framework date_time regex) + +# Enable C++11 features on gcc/clang +if("${CMAKE_CXX_COMPILER_ID}" MATCHES "(GNU|Clang)") + set(CMAKE_CXX_FLAGS "-std=c++11") +endif() + +# Configure to run all the tests? +if(${EXERCISM_RUN_ALL_TESTS}) + add_definitions(-DEXERCISM_RUN_ALL_TESTS) +endif() + +# Get a source filename from the exercise name by replacing -'s with _'s +string(REPLACE "-" "_" file ${exercise}) + +# Implementation could be only a header +if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/${file}.cpp) + set(exercise_cpp ${file}.cpp) +else() + set(exercise_cpp "") +endif() + +# Build executable from sources and headers +add_executable(${exercise} ${file}_test.cpp ${exercise_cpp} ${file}.h) + +# We need boost includes +target_include_directories(${exercise} PRIVATE ${Boost_INCLUDE_DIRS}) + +# We need boost libraries +target_link_libraries(${exercise} ${Boost_LIBRARIES}) + +# Tell MSVC not to warn us about unchecked iterators in debug builds +if(${MSVC}) + set_target_properties(${exercise} PROPERTIES + COMPILE_DEFINITIONS_DEBUG _SCL_SECURE_NO_WARNINGS) +endif() + +# Run the tests on every build +add_custom_command(TARGET ${exercise} POST_BUILD COMMAND ${exercise}) diff --git a/cpp/space-age/README.md b/cpp/space-age/README.md new file mode 100644 index 0000000..7347a71 --- /dev/null +++ b/cpp/space-age/README.md @@ -0,0 +1,56 @@ +# Space Age + +Write a program that, given an age in seconds, calculates how old someone is in terms of a given planet's solar years. + +Given an age in seconds, calculate how old someone would be on: + + - Earth: orbital period 365.25 Earth days, or 31557600 seconds + - Mercury: orbital period 0.2408467 Earth years + - Venus: orbital period 0.61519726 Earth years + - Mars: orbital period 1.8808158 Earth years + - Jupiter: orbital period 11.862615 Earth years + - Saturn: orbital period 29.447498 Earth years + - Uranus: orbital period 84.016846 Earth years + - Neptune: orbital period 164.79132 Earth years + +So if you were told someone were 1,000,000,000 seconds old, you should +be able to say that they're 31 Earth-years old. + +If you're wondering why Pluto didn't make the cut, go watch [this +youtube video](http://www.youtube.com/watch?v=Z_2gbGXzFbs). + +## Getting Started + +Make sure you have read the [getting started with C++](http://help.exercism.io/getting-started-with-cpp.html) +page on the [exercism help site](http://help.exercism.io/). This covers +the basic information on setting up the development environment expected +by the exercises. + +## Passing the Tests + +Get the first test compiling, linking and passing by following the [three +rules of test-driven development](http://butunclebob.com/ArticleS.UncleBob.TheThreeRulesOfTdd). +Create just enough structure by declaring namespaces, functions, classes, +etc., to satisfy any compiler errors and get the test to fail. Then write +just enough code to get the test to pass. Once you've done that, +uncomment the next test by moving the following line past the next test. + +```C++ +#if defined(EXERCISM_RUN_ALL_TESTS) +``` + +This may result in compile errors as new constructs may be invoked that +you haven't yet declared or defined. Again, fix the compile errors minimally +to get a failing test, then change the code minimally to pass the test, +refactor your implementation for readability and expressiveness and then +go on to the next test. + +Try to use standard C++11 facilities in preference to writing your own +low-level algorithms or facilities by hand. [CppReference](http://en.cppreference.com/) +is a wiki reference to the C++ language and standard library. If you +are new to C++, but have programmed in C, beware of +[C traps and pitfalls](http://www.slideshare.net/LegalizeAdulthood/c-traps-and-pitfalls-for-c-programmers). + +## Source + +Partially inspired by Chapter 1 in Chris Pine's online Learn to Program tutorial. [view source](http://pine.fm/LearnToProgram/?Chapter=01) diff --git a/cpp/space-age/space_age_test.cpp b/cpp/space-age/space_age_test.cpp new file mode 100644 index 0000000..05e9fc0 --- /dev/null +++ b/cpp/space-age/space_age_test.cpp @@ -0,0 +1,81 @@ +#include "space_age.h" +#define BOOST_TEST_MAIN +#include +#include + +namespace +{ +const double accuracy = 0.005; +} + +BOOST_AUTO_TEST_CASE(age_in_seconds) +{ + const space_age::space_age age(1000000); + + BOOST_REQUIRE_EQUAL(1000000, age.seconds()); +} + +#if defined(EXERCISM_RUN_ALL_TESTS) +BOOST_AUTO_TEST_CASE(age_in_earth_years) +{ + const space_age::space_age age(1000000000); + + BOOST_REQUIRE_LT(std::abs(31.69 - age.on_earth()), accuracy); +} + +BOOST_AUTO_TEST_CASE(age_in_mercury_years) +{ + const space_age::space_age age(2134835688); + + BOOST_REQUIRE_LT(std::abs(67.65 - age.on_earth()), accuracy); + BOOST_REQUIRE_LT(std::abs(280.88 - age.on_mercury()), accuracy); +} + +BOOST_AUTO_TEST_CASE(age_in_venus_years) +{ + const space_age::space_age age(189839836); + + BOOST_REQUIRE_LT(std::abs(6.02- age.on_earth()), accuracy); + BOOST_REQUIRE_LT(std::abs(9.78 - age.on_venus()), accuracy); +} + +BOOST_AUTO_TEST_CASE(age_in_mars_years) +{ + const space_age::space_age age(2329871239); + + BOOST_REQUIRE_LT(std::abs(73.83 - age.on_earth()), accuracy); + BOOST_REQUIRE_LT(std::abs(39.25 - age.on_mars()), accuracy); +} + +BOOST_AUTO_TEST_CASE(age_in_jupiter_years) +{ + const space_age::space_age age(901876382); + + BOOST_REQUIRE_LT(std::abs(28.58 - age.on_earth()), accuracy); + BOOST_REQUIRE_LT(std::abs(2.41 - age.on_jupiter()), accuracy); +} + +BOOST_AUTO_TEST_CASE(age_in_saturn_years) +{ + const space_age::space_age age(3000000000); + + BOOST_REQUIRE_LT(std::abs(95.06 - age.on_earth()), accuracy); + BOOST_REQUIRE_LT(std::abs(3.23 - age.on_saturn()), accuracy); +} + +BOOST_AUTO_TEST_CASE(age_in_uranus_years) +{ + const space_age::space_age age(3210123456); + + BOOST_REQUIRE_LT(std::abs(101.72 - age.on_earth()), accuracy); + BOOST_REQUIRE_LT(std::abs(1.21 - age.on_uranus()), accuracy); +} + +BOOST_AUTO_TEST_CASE(age_in_neptune_year) +{ + const space_age::space_age age(8210123456); + + BOOST_REQUIRE_LT(std::abs(260.16 - age.on_earth()), accuracy); + BOOST_REQUIRE_LT(std::abs(1.58 - age.on_neptune()), accuracy); +} +#endif