roman_numbers: initial commit

cpp/roman-numerals/CMakeLists.txt

@@ -0,0 +1,59 @@
+# 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()
+
+# Include a test helper header if it exists
+if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/require_equal_containers.h)
+    set(test_helper require_equal_containers.h)
+else()
+    set(test_helper "")
+endif()
+
+# Build executable from sources and headers
+add_executable(${exercise} ${file}_test.cpp ${test_helper} ${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})

cpp/roman-numerals/README.md

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+# Roman Numerals
+
+Write a function to convert from normal numbers to Roman Numerals: e.g.
+
+The Romans were a clever bunch. They conquered most of Europe and ruled
+it for hundreds of years. They invented concrete and straight roads and
+even bikinis. One thing they never discovered though was the number
+zero. This made writing and dating extensive histories of their exploits
+slightly more challenging, but the system of numbers they came up with
+is still in use today. For example the BBC uses Roman numerals to date
+their programmes.
+
+The Romans wrote numbers using letters - I, V, X, L, C, D, M. (notice
+these letters have lots of straight lines and are hence easy to hack
+into stone tablets).
+
+```
+ 1  => I
+10  => X
+ 7  => VII
+```
+
+There is no need to be able to convert numbers larger than about 3000.
+(The Romans themselves didn't tend to go any higher)
+
+Wikipedia says: Modern Roman numerals ... are written by expressing each
+digit separately starting with the left most digit and skipping any
+digit with a value of zero.
+
+To see this in practice, consider the example of 1990.
+
+In Roman numerals 1990 is MCMXC:
+
+1000=M
+900=CM
+90=XC
+
+2008 is written as MMVIII:
+
+2000=MM
+8=VIII
+
+See also: http://www.novaroma.org/via_romana/numbers.html
+
+## 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
+
+The Roman Numeral Kata [view source](http://codingdojo.org/cgi-bin/wiki.pl?KataRomanNumerals)

cpp/roman-numerals/roman_numerals_test.cpp

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+#include "roman_numerals.h"
+#define BOOST_TEST_MAIN
+#include <boost/test/unit_test.hpp>
+
+BOOST_AUTO_TEST_CASE(one_yields_I)
+{
+    BOOST_REQUIRE_EQUAL("I", roman::convert(1));
+}
+
+#if defined(EXERCISM_RUN_ALL_TESTS)
+BOOST_AUTO_TEST_CASE(two_yields_II)
+{
+    BOOST_REQUIRE_EQUAL("II", roman::convert(2));
+}
+
+BOOST_AUTO_TEST_CASE(three_yields_III)
+{
+    BOOST_REQUIRE_EQUAL("III", roman::convert(3));
+}
+
+BOOST_AUTO_TEST_CASE(four_yields_IV)
+{
+    BOOST_REQUIRE_EQUAL("IV", roman::convert(4));
+}
+
+BOOST_AUTO_TEST_CASE(five_yields_V)
+{
+    BOOST_REQUIRE_EQUAL("V", roman::convert(5));
+}
+
+BOOST_AUTO_TEST_CASE(six_yields_VI)
+{
+    BOOST_REQUIRE_EQUAL("VI", roman::convert(6));
+}
+
+BOOST_AUTO_TEST_CASE(nine_yields_IX)
+{
+    BOOST_REQUIRE_EQUAL("IX", roman::convert(9));
+}
+
+BOOST_AUTO_TEST_CASE(twenty_seven_yields_XXVII)
+{
+    BOOST_REQUIRE_EQUAL("XXVII", roman::convert(27));
+}
+
+BOOST_AUTO_TEST_CASE(forty_eight_yields_XLVIII)
+{
+    BOOST_REQUIRE_EQUAL("XLVIII", roman::convert(48));
+}
+
+BOOST_AUTO_TEST_CASE(fifty_nine_yields_LIX)
+{
+    BOOST_REQUIRE_EQUAL("LIX", roman::convert(59));
+}
+
+BOOST_AUTO_TEST_CASE(ninety_three_yields_XCIII)
+{
+    BOOST_REQUIRE_EQUAL("XCIII", roman::convert(93));
+}
+
+BOOST_AUTO_TEST_CASE(one_hundred_forty_one_yields_CXLI)
+{
+    BOOST_REQUIRE_EQUAL("CXLI", roman::convert(141));
+}
+
+BOOST_AUTO_TEST_CASE(one_hundred_sixty_three_yields_CLXIII)
+{
+    BOOST_REQUIRE_EQUAL("CLXIII", roman::convert(163));
+}
+
+BOOST_AUTO_TEST_CASE(four_hundred_two_yields_CDII)
+{
+    BOOST_REQUIRE_EQUAL("CDII", roman::convert(402));
+}
+
+BOOST_AUTO_TEST_CASE(five_hundred_seventy_five_yields_DLXXV)
+{
+    BOOST_REQUIRE_EQUAL("DLXXV", roman::convert(575));
+}
+
+BOOST_AUTO_TEST_CASE(nine_hundred_eleven_yields_CMXI)
+{
+    BOOST_REQUIRE_EQUAL("CMXI", roman::convert(911));
+}
+
+BOOST_AUTO_TEST_CASE(one_thousand_twenty_four_yields_MXXIV)
+{
+    BOOST_REQUIRE_EQUAL("MXXIV", roman::convert(1024));
+}
+
+BOOST_AUTO_TEST_CASE(three_thousand_yields_MMM)
+{
+    BOOST_REQUIRE_EQUAL("MMM", roman::convert(3000));
+}
+#endif