beer_song: initial commit
This commit is contained in:
parent
83939d8584
commit
bc8abe0d53
5 changed files with 541 additions and 0 deletions
52
cpp/beer-song/CMakeLists.txt
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52
cpp/beer-song/CMakeLists.txt
Normal file
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@ -0,0 +1,52 @@
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# Get the exercise name from the current directory
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get_filename_component(exercise ${CMAKE_CURRENT_SOURCE_DIR} NAME)
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# Basic CMake project
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cmake_minimum_required(VERSION 2.8.11)
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# Name the project after the exercise
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project(${exercise} CXX)
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# Locate Boost libraries: unit_test_framework, date_time and regex
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set(Boost_USE_STATIC_LIBS ON)
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set(Boost_USE_MULTITHREADED ON)
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set(Boost_USE_STATIC_RUNTIME OFF)
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find_package(Boost 1.55 REQUIRED COMPONENTS unit_test_framework date_time regex)
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# Enable C++11 features on gcc/clang
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if("${CMAKE_CXX_COMPILER_ID}" MATCHES "(GNU|Clang)")
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set(CMAKE_CXX_FLAGS "-std=c++11")
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endif()
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# Configure to run all the tests?
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if(${EXERCISM_RUN_ALL_TESTS})
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add_definitions(-DEXERCISM_RUN_ALL_TESTS)
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endif()
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# Get a source filename from the exercise name by replacing -'s with _'s
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string(REPLACE "-" "_" file ${exercise})
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# Implementation could be only a header
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if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/${file}.cpp)
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set(exercise_cpp ${file}.cpp)
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else()
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set(exercise_cpp "")
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endif()
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# Build executable from sources and headers
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add_executable(${exercise} ${file}_test.cpp ${exercise_cpp} ${file}.h)
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# We need boost includes
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target_include_directories(${exercise} PRIVATE ${Boost_INCLUDE_DIRS})
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# We need boost libraries
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target_link_libraries(${exercise} ${Boost_LIBRARIES})
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# Tell MSVC not to warn us about unchecked iterators in debug builds
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if(${MSVC})
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set_target_properties(${exercise} PROPERTIES
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COMPILE_DEFINITIONS_DEBUG _SCL_SECURE_NO_WARNINGS)
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endif()
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# Run the tests on every build
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add_custom_command(TARGET ${exercise} POST_BUILD COMMAND ${exercise})
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357
cpp/beer-song/README.md
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357
cpp/beer-song/README.md
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@ -0,0 +1,357 @@
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# Beer Song
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Write a program which produces the lyrics to that beloved classic, that field-trip favorite: 99 Bottles of Beer on the Wall.
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Note that not all verses are identical.
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```plain
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99 bottles of beer on the wall, 99 bottles of beer.
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Take one down and pass it around, 98 bottles of beer on the wall.
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98 bottles of beer on the wall, 98 bottles of beer.
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Take one down and pass it around, 97 bottles of beer on the wall.
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97 bottles of beer on the wall, 97 bottles of beer.
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Take one down and pass it around, 96 bottles of beer on the wall.
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96 bottles of beer on the wall, 96 bottles of beer.
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Take one down and pass it around, 95 bottles of beer on the wall.
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95 bottles of beer on the wall, 95 bottles of beer.
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Take one down and pass it around, 94 bottles of beer on the wall.
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94 bottles of beer on the wall, 94 bottles of beer.
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Take one down and pass it around, 93 bottles of beer on the wall.
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93 bottles of beer on the wall, 93 bottles of beer.
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Take one down and pass it around, 92 bottles of beer on the wall.
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92 bottles of beer on the wall, 92 bottles of beer.
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Take one down and pass it around, 91 bottles of beer on the wall.
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91 bottles of beer on the wall, 91 bottles of beer.
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Take one down and pass it around, 90 bottles of beer on the wall.
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90 bottles of beer on the wall, 90 bottles of beer.
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Take one down and pass it around, 89 bottles of beer on the wall.
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89 bottles of beer on the wall, 89 bottles of beer.
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Take one down and pass it around, 88 bottles of beer on the wall.
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88 bottles of beer on the wall, 88 bottles of beer.
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Take one down and pass it around, 87 bottles of beer on the wall.
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87 bottles of beer on the wall, 87 bottles of beer.
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Take one down and pass it around, 86 bottles of beer on the wall.
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86 bottles of beer on the wall, 86 bottles of beer.
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Take one down and pass it around, 85 bottles of beer on the wall.
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85 bottles of beer on the wall, 85 bottles of beer.
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Take one down and pass it around, 84 bottles of beer on the wall.
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84 bottles of beer on the wall, 84 bottles of beer.
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Take one down and pass it around, 83 bottles of beer on the wall.
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83 bottles of beer on the wall, 83 bottles of beer.
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Take one down and pass it around, 82 bottles of beer on the wall.
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82 bottles of beer on the wall, 82 bottles of beer.
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Take one down and pass it around, 81 bottles of beer on the wall.
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81 bottles of beer on the wall, 81 bottles of beer.
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Take one down and pass it around, 80 bottles of beer on the wall.
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80 bottles of beer on the wall, 80 bottles of beer.
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Take one down and pass it around, 79 bottles of beer on the wall.
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79 bottles of beer on the wall, 79 bottles of beer.
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Take one down and pass it around, 78 bottles of beer on the wall.
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78 bottles of beer on the wall, 78 bottles of beer.
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Take one down and pass it around, 77 bottles of beer on the wall.
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77 bottles of beer on the wall, 77 bottles of beer.
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Take one down and pass it around, 76 bottles of beer on the wall.
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76 bottles of beer on the wall, 76 bottles of beer.
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Take one down and pass it around, 75 bottles of beer on the wall.
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75 bottles of beer on the wall, 75 bottles of beer.
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Take one down and pass it around, 74 bottles of beer on the wall.
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74 bottles of beer on the wall, 74 bottles of beer.
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Take one down and pass it around, 73 bottles of beer on the wall.
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73 bottles of beer on the wall, 73 bottles of beer.
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Take one down and pass it around, 72 bottles of beer on the wall.
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72 bottles of beer on the wall, 72 bottles of beer.
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Take one down and pass it around, 71 bottles of beer on the wall.
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71 bottles of beer on the wall, 71 bottles of beer.
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Take one down and pass it around, 70 bottles of beer on the wall.
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70 bottles of beer on the wall, 70 bottles of beer.
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Take one down and pass it around, 69 bottles of beer on the wall.
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69 bottles of beer on the wall, 69 bottles of beer.
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Take one down and pass it around, 68 bottles of beer on the wall.
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68 bottles of beer on the wall, 68 bottles of beer.
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Take one down and pass it around, 67 bottles of beer on the wall.
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67 bottles of beer on the wall, 67 bottles of beer.
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Take one down and pass it around, 66 bottles of beer on the wall.
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66 bottles of beer on the wall, 66 bottles of beer.
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Take one down and pass it around, 65 bottles of beer on the wall.
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65 bottles of beer on the wall, 65 bottles of beer.
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Take one down and pass it around, 64 bottles of beer on the wall.
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64 bottles of beer on the wall, 64 bottles of beer.
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Take one down and pass it around, 63 bottles of beer on the wall.
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63 bottles of beer on the wall, 63 bottles of beer.
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Take one down and pass it around, 62 bottles of beer on the wall.
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62 bottles of beer on the wall, 62 bottles of beer.
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Take one down and pass it around, 61 bottles of beer on the wall.
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61 bottles of beer on the wall, 61 bottles of beer.
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Take one down and pass it around, 60 bottles of beer on the wall.
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60 bottles of beer on the wall, 60 bottles of beer.
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Take one down and pass it around, 59 bottles of beer on the wall.
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59 bottles of beer on the wall, 59 bottles of beer.
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Take one down and pass it around, 58 bottles of beer on the wall.
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58 bottles of beer on the wall, 58 bottles of beer.
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Take one down and pass it around, 57 bottles of beer on the wall.
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||||
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57 bottles of beer on the wall, 57 bottles of beer.
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Take one down and pass it around, 56 bottles of beer on the wall.
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||||
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56 bottles of beer on the wall, 56 bottles of beer.
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Take one down and pass it around, 55 bottles of beer on the wall.
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||||
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55 bottles of beer on the wall, 55 bottles of beer.
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Take one down and pass it around, 54 bottles of beer on the wall.
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||||
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54 bottles of beer on the wall, 54 bottles of beer.
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Take one down and pass it around, 53 bottles of beer on the wall.
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53 bottles of beer on the wall, 53 bottles of beer.
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Take one down and pass it around, 52 bottles of beer on the wall.
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52 bottles of beer on the wall, 52 bottles of beer.
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Take one down and pass it around, 51 bottles of beer on the wall.
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51 bottles of beer on the wall, 51 bottles of beer.
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Take one down and pass it around, 50 bottles of beer on the wall.
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50 bottles of beer on the wall, 50 bottles of beer.
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Take one down and pass it around, 49 bottles of beer on the wall.
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49 bottles of beer on the wall, 49 bottles of beer.
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Take one down and pass it around, 48 bottles of beer on the wall.
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48 bottles of beer on the wall, 48 bottles of beer.
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Take one down and pass it around, 47 bottles of beer on the wall.
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47 bottles of beer on the wall, 47 bottles of beer.
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Take one down and pass it around, 46 bottles of beer on the wall.
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46 bottles of beer on the wall, 46 bottles of beer.
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Take one down and pass it around, 45 bottles of beer on the wall.
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45 bottles of beer on the wall, 45 bottles of beer.
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Take one down and pass it around, 44 bottles of beer on the wall.
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44 bottles of beer on the wall, 44 bottles of beer.
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Take one down and pass it around, 43 bottles of beer on the wall.
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43 bottles of beer on the wall, 43 bottles of beer.
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Take one down and pass it around, 42 bottles of beer on the wall.
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42 bottles of beer on the wall, 42 bottles of beer.
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Take one down and pass it around, 41 bottles of beer on the wall.
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41 bottles of beer on the wall, 41 bottles of beer.
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Take one down and pass it around, 40 bottles of beer on the wall.
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40 bottles of beer on the wall, 40 bottles of beer.
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Take one down and pass it around, 39 bottles of beer on the wall.
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39 bottles of beer on the wall, 39 bottles of beer.
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Take one down and pass it around, 38 bottles of beer on the wall.
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38 bottles of beer on the wall, 38 bottles of beer.
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Take one down and pass it around, 37 bottles of beer on the wall.
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37 bottles of beer on the wall, 37 bottles of beer.
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Take one down and pass it around, 36 bottles of beer on the wall.
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36 bottles of beer on the wall, 36 bottles of beer.
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Take one down and pass it around, 35 bottles of beer on the wall.
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||||
|
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35 bottles of beer on the wall, 35 bottles of beer.
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Take one down and pass it around, 34 bottles of beer on the wall.
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34 bottles of beer on the wall, 34 bottles of beer.
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Take one down and pass it around, 33 bottles of beer on the wall.
|
||||
|
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33 bottles of beer on the wall, 33 bottles of beer.
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Take one down and pass it around, 32 bottles of beer on the wall.
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32 bottles of beer on the wall, 32 bottles of beer.
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Take one down and pass it around, 31 bottles of beer on the wall.
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31 bottles of beer on the wall, 31 bottles of beer.
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Take one down and pass it around, 30 bottles of beer on the wall.
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|
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30 bottles of beer on the wall, 30 bottles of beer.
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Take one down and pass it around, 29 bottles of beer on the wall.
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29 bottles of beer on the wall, 29 bottles of beer.
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Take one down and pass it around, 28 bottles of beer on the wall.
|
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|
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28 bottles of beer on the wall, 28 bottles of beer.
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Take one down and pass it around, 27 bottles of beer on the wall.
|
||||
|
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27 bottles of beer on the wall, 27 bottles of beer.
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Take one down and pass it around, 26 bottles of beer on the wall.
|
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|
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26 bottles of beer on the wall, 26 bottles of beer.
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Take one down and pass it around, 25 bottles of beer on the wall.
|
||||
|
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25 bottles of beer on the wall, 25 bottles of beer.
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Take one down and pass it around, 24 bottles of beer on the wall.
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24 bottles of beer on the wall, 24 bottles of beer.
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Take one down and pass it around, 23 bottles of beer on the wall.
|
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|
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23 bottles of beer on the wall, 23 bottles of beer.
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Take one down and pass it around, 22 bottles of beer on the wall.
|
||||
|
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22 bottles of beer on the wall, 22 bottles of beer.
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Take one down and pass it around, 21 bottles of beer on the wall.
|
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|
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21 bottles of beer on the wall, 21 bottles of beer.
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Take one down and pass it around, 20 bottles of beer on the wall.
|
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20 bottles of beer on the wall, 20 bottles of beer.
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Take one down and pass it around, 19 bottles of beer on the wall.
|
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|
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19 bottles of beer on the wall, 19 bottles of beer.
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Take one down and pass it around, 18 bottles of beer on the wall.
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18 bottles of beer on the wall, 18 bottles of beer.
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Take one down and pass it around, 17 bottles of beer on the wall.
|
||||
|
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17 bottles of beer on the wall, 17 bottles of beer.
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||||
Take one down and pass it around, 16 bottles of beer on the wall.
|
||||
|
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16 bottles of beer on the wall, 16 bottles of beer.
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||||
Take one down and pass it around, 15 bottles of beer on the wall.
|
||||
|
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15 bottles of beer on the wall, 15 bottles of beer.
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Take one down and pass it around, 14 bottles of beer on the wall.
|
||||
|
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14 bottles of beer on the wall, 14 bottles of beer.
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||||
Take one down and pass it around, 13 bottles of beer on the wall.
|
||||
|
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13 bottles of beer on the wall, 13 bottles of beer.
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||||
Take one down and pass it around, 12 bottles of beer on the wall.
|
||||
|
||||
12 bottles of beer on the wall, 12 bottles of beer.
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||||
Take one down and pass it around, 11 bottles of beer on the wall.
|
||||
|
||||
11 bottles of beer on the wall, 11 bottles of beer.
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||||
Take one down and pass it around, 10 bottles of beer on the wall.
|
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|
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10 bottles of beer on the wall, 10 bottles of beer.
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Take one down and pass it around, 9 bottles of beer on the wall.
|
||||
|
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9 bottles of beer on the wall, 9 bottles of beer.
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Take one down and pass it around, 8 bottles of beer on the wall.
|
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|
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8 bottles of beer on the wall, 8 bottles of beer.
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Take one down and pass it around, 7 bottles of beer on the wall.
|
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|
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7 bottles of beer on the wall, 7 bottles of beer.
|
||||
Take one down and pass it around, 6 bottles of beer on the wall.
|
||||
|
||||
6 bottles of beer on the wall, 6 bottles of beer.
|
||||
Take one down and pass it around, 5 bottles of beer on the wall.
|
||||
|
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5 bottles of beer on the wall, 5 bottles of beer.
|
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Take one down and pass it around, 4 bottles of beer on the wall.
|
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|
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4 bottles of beer on the wall, 4 bottles of beer.
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Take one down and pass it around, 3 bottles of beer on the wall.
|
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|
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3 bottles of beer on the wall, 3 bottles of beer.
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Take one down and pass it around, 2 bottles of beer on the wall.
|
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|
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2 bottles of beer on the wall, 2 bottles of beer.
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Take one down and pass it around, 1 bottle of beer on the wall.
|
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1 bottle of beer on the wall, 1 bottle of beer.
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Take it down and pass it around, no more bottles of beer on the wall.
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No more bottles of beer on the wall, no more bottles of beer.
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Go to the store and buy some more, 99 bottles of beer on the wall.
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```
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## For bonus points
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Did you get the tests passing and the code clean? If you want to, these
|
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are some additional things you could try:
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* Remove as much duplication as you possibly can.
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* Optimize for readability, even if it means introducing duplication.
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* If you've removed all the duplication, do you have a lot of
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conditionals? Try replacing the conditionals with polymorphism, if it
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applies in this language. How readable is it?
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|
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Then please share your thoughts in a comment on the submission. Did this
|
||||
experiment make the code better? Worse? Did you learn anything from it?
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## 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.
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|
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## Passing the Tests
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||||
|
||||
Get the first test compiling, linking and passing by following the [three
|
||||
rules of test-driven development](http://butunclebob.com/ArticleS.UncleBob.TheThreeRulesOfTdd).
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||||
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.
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||||
|
||||
```C++
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#if defined(EXERCISM_RUN_ALL_TESTS)
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||||
```
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|
||||
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).
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|
||||
## Source
|
||||
|
||||
Learn to Program by Chris Pine [view source](http://pine.fm/LearnToProgram/?Chapter=06)
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||||
58
cpp/beer-song/beer_song.cpp
Normal file
58
cpp/beer-song/beer_song.cpp
Normal file
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@ -0,0 +1,58 @@
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#include "beer_song.h"
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#include <cctype>
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#include <sstream>
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namespace beer {
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using namespace std;
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||||
string verse(int index)
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{
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auto count_str = [](int count) -> string {
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if (0 == count)
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return "no more bottles ";
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if (1 == count)
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return "1 bottle ";
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ostringstream oss;
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oss << count << " bottles ";
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return oss.str();
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};
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auto capitalize_first = [](const string &str) -> string {
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string result = str;
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result.front() = toupper(result.front());
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return result;
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};
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return capitalize_first(count_str(index))
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+ "of beer on the wall, "
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+ count_str(index)
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+ "of beer.\n"
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+ (index ? string("Take ")
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+ (index == 1 ? "it" : "one")
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+ " down and pass it around, "
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: string("Go to the store and buy some more, "))
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+ count_str(index ? index - 1 : 99)
|
||||
+ "of beer on the wall.\n";
|
||||
}
|
||||
|
||||
string sing(int from_index, int to_index)
|
||||
{
|
||||
string result;
|
||||
|
||||
for (int i = from_index; i >= to_index; --i) {
|
||||
|
||||
result += (i == from_index ? "" : "\n");
|
||||
result += verse(i);
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
}
|
||||
12
cpp/beer-song/beer_song.h
Normal file
12
cpp/beer-song/beer_song.h
Normal file
|
|
@ -0,0 +1,12 @@
|
|||
#pragma once
|
||||
|
||||
#define EXERCISM_RUN_ALL_TESTS
|
||||
|
||||
#include <string>
|
||||
|
||||
namespace beer {
|
||||
|
||||
std::string verse(int index);
|
||||
std::string sing(int from_index, int to_index = 0);
|
||||
|
||||
}
|
||||
62
cpp/beer-song/beer_song_test.cpp
Normal file
62
cpp/beer-song/beer_song_test.cpp
Normal file
|
|
@ -0,0 +1,62 @@
|
|||
#include "beer_song.h"
|
||||
#define BOOST_TEST_MAIN
|
||||
#include <boost/test/unit_test.hpp>
|
||||
|
||||
using namespace std;
|
||||
|
||||
BOOST_AUTO_TEST_CASE(prints_an_arbitrary_verse)
|
||||
{
|
||||
string expected = "8 bottles of beer on the wall, 8 bottles of beer.\n"
|
||||
"Take one down and pass it around, 7 bottles of beer on the wall.\n";
|
||||
|
||||
BOOST_REQUIRE_EQUAL(expected, beer::verse(8));
|
||||
}
|
||||
|
||||
#if defined(EXERCISM_RUN_ALL_TESTS)
|
||||
BOOST_AUTO_TEST_CASE(handles_1_bottle)
|
||||
{
|
||||
string expected = "1 bottle of beer on the wall, 1 bottle of beer.\n"
|
||||
"Take it down and pass it around, no more bottles of beer on the wall.\n";
|
||||
|
||||
BOOST_REQUIRE_EQUAL(expected, beer::verse(1));
|
||||
}
|
||||
|
||||
BOOST_AUTO_TEST_CASE(handles_0_bottles)
|
||||
{
|
||||
string expected = "No more bottles of beer on the wall, no more bottles of beer.\n"
|
||||
"Go to the store and buy some more, 99 bottles of beer on the wall.\n";
|
||||
|
||||
BOOST_REQUIRE_EQUAL(expected, beer::verse(0));
|
||||
}
|
||||
|
||||
BOOST_AUTO_TEST_CASE(sings_several_verses)
|
||||
{
|
||||
string expected = "8 bottles of beer on the wall, 8 bottles of beer.\n"
|
||||
"Take one down and pass it around, 7 bottles of beer on the wall.\n"
|
||||
"\n"
|
||||
"7 bottles of beer on the wall, 7 bottles of beer.\n"
|
||||
"Take one down and pass it around, 6 bottles of beer on the wall.\n"
|
||||
"\n"
|
||||
"6 bottles of beer on the wall, 6 bottles of beer.\n"
|
||||
"Take one down and pass it around, 5 bottles of beer on the wall.\n";
|
||||
|
||||
BOOST_REQUIRE_EQUAL(expected, beer::sing(8, 6));
|
||||
}
|
||||
|
||||
BOOST_AUTO_TEST_CASE(sings_the_rest_of_the_verses)
|
||||
{
|
||||
string expected = "3 bottles of beer on the wall, 3 bottles of beer.\n"
|
||||
"Take one down and pass it around, 2 bottles of beer on the wall.\n"
|
||||
"\n"
|
||||
"2 bottles of beer on the wall, 2 bottles of beer.\n"
|
||||
"Take one down and pass it around, 1 bottle of beer on the wall.\n"
|
||||
"\n"
|
||||
"1 bottle of beer on the wall, 1 bottle of beer.\n"
|
||||
"Take it down and pass it around, no more bottles of beer on the wall.\n"
|
||||
"\n"
|
||||
"No more bottles of beer on the wall, no more bottles of beer.\n"
|
||||
"Go to the store and buy some more, 99 bottles of beer on the wall.\n";
|
||||
|
||||
BOOST_REQUIRE_EQUAL(expected, beer::sing(3));
|
||||
}
|
||||
#endif
|
||||
Loading…
Add table
Add a link
Reference in a new issue