few, FINALLY BUILDED

.gitignore

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+cpp/hello-world/.exercism/metadata.json

cpp/hello-world/.exercism/config.json

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+{
+  "authors": [
+    "samsondstl"
+  ],
+  "contributors": [
+    "elyashiv",
+    "jackhughesweb",
+    "KevinWMatthews",
+    "patricksjackson",
+    "sturzl"
+  ],
+  "files": {
+    "solution": [
+      "hello_world.cpp",
+      "hello_world.h"
+    ],
+    "test": [
+      "hello_world_test.cpp"
+    ],
+    "example": [
+      ".meta/example.cpp",
+      ".meta/example.h"
+    ]
+  },
+  "blurb": "Exercism's classic introductory exercise. Just say \"Hello, World!\".",
+  "source": "This is an exercise to introduce users to using Exercism",
+  "source_url": "https://en.wikipedia.org/wiki/%22Hello,_world!%22_program"
+}

cpp/hello-world/.gitignore

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+# Билд-артефакты
+build/
+**/*build*/
+*.sln
+*.vcxproj*
+*.cmake
+CMakeCache.txt
+CMakeFiles/
+Makefile
+
+.cache/
+
+# Бинарники
+*.out
+*.exe
+*.a
+*.so
+*.dll
+
+# Отладка
+*.ilk
+*.pdb
+*.dSYM/

cpp/hello-world/CMakeLists.txt

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+# Get the exercise name from the current directory
+get_filename_component(exercise ${CMAKE_CURRENT_SOURCE_DIR} NAME)
+
+# Basic CMake project
+cmake_minimum_required(VERSION 3.5.1)
+
+# Name the project after the exercise
+project(${exercise} CXX)
+
+# 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 ${file}.cpp)
+else()
+    set(exercise_cpp "")
+endif()
+
+# Use the common Catch library?
+if(EXERCISM_COMMON_CATCH)
+    # For Exercism track development only
+    add_executable(${exercise} ${file}_test.cpp ${exercise_cpp} ${file}.h $<TARGET_OBJECTS:catchlib>)
+elseif(EXERCISM_TEST_SUITE)
+    # The Exercism test suite is being run, the Docker image already
+    # includes a pre-built version of Catch.
+    find_package(Catch2 REQUIRED)
+    add_executable(${exercise} ${file}_test.cpp ${exercise_cpp} ${file}.h)
+    target_link_libraries(${exercise} PRIVATE Catch2::Catch2WithMain)
+    # When Catch is installed system wide we need to include a different
+    # header, we need this define to use the correct one.
+    target_compile_definitions(${exercise} PRIVATE EXERCISM_TEST_SUITE)
+else()
+    # Build executable from sources and headers
+    add_executable(${exercise} ${file}_test.cpp ${exercise_cpp} ${file}.h test/tests-main.cpp)
+endif()
+
+set_target_properties(${exercise} PROPERTIES
+    CXX_STANDARD 17
+    CXX_STANDARD_REQUIRED OFF
+    CXX_EXTENSIONS OFF
+)
+
+set(CMAKE_BUILD_TYPE Debug)
+
+if("${CMAKE_CXX_COMPILER_ID}" MATCHES "(GNU|Clang)")
+    set_target_properties(${exercise} PROPERTIES
+        COMPILE_FLAGS "-Wall -Wextra -Wpedantic -Werror"
+    )
+endif()
+
+# Configure to run all the tests?
+if(${EXERCISM_RUN_ALL_TESTS})
+    target_compile_definitions(${exercise} PRIVATE EXERCISM_RUN_ALL_TESTS)
+endif()
+
+# Tell MSVC not to warn us about unchecked iterators in debug builds
+# Treat warnings as errors
+# Treat type conversion warnings C4244 and C4267 as level 4 warnings, i.e. ignore them in level 3
+if(${MSVC})
+    set_target_properties(${exercise} PROPERTIES
+        COMPILE_DEFINITIONS_DEBUG _SCL_SECURE_NO_WARNINGS
+        COMPILE_FLAGS "/WX /w44244 /w44267")
+endif()
+
+# Run the tests on every build
+add_custom_target(test_${exercise} ALL DEPENDS ${exercise} COMMAND ${exercise})

cpp/hello-world/HELP.md

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+# Help
+
+## Running the tests
+
+Running the tests involves running `cmake -G` and then using the build command appropriate for your platform.
+Detailed instructions on how to do this can be found on the [Running the Tests][cpp-tests-instructions] page for C++ on exercism.org.
+
+## Passing the Tests
+
+When you start a new exercise locally, the files are configured so that only the first test is performed.
+Get that first test compiling, linking and passing by following the [three rules of test-driven development][three-laws-of-tdd].
+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 line `if defined(EXERCISM_RUN_ALL_TESTS)` past the next test.
+
+See the example below from the Bob exercise (file `bob_test.cpp`, line 15):
+
+```diff
+-#if defined(EXERCISM_RUN_ALL_TESTS)
+TEST_CASE("shouting")
+{
+    REQUIRE("Whoa, chill out!" == bob::hey("WATCH OUT!"));
+}
++#if defined(EXERCISM_RUN_ALL_TESTS)
+```
+
+Moving this line past the next test 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++17 facilities in preference to writing your own low-level algorithms or facilities by hand.
+
+[cpp-tests-instructions]: https://exercism.org/docs/tracks/cpp/tests
+[three-laws-of-tdd]: http://butunclebob.com/ArticleS.UncleBob.TheThreeRulesOfTdd
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit hello_world.cpp hello_world.h` command.
+This command will upload your solution to the Exercism website and print the solution page's URL.
+
+It's possible to submit an incomplete solution which allows you to:
+
+- See how others have completed the exercise
+- Request help from a mentor
+
+## Need to get help?
+
+If you'd like help solving the exercise, check the following pages:
+
+- The [C++ track's documentation](https://exercism.org/docs/tracks/cpp)
+- The [C++ track's programming category on the forum](https://forum.exercism.org/c/programming/cpp)
+- [Exercism's programming category on the forum](https://forum.exercism.org/c/programming/5)
+- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
+
+Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
+
+To get help if you're having trouble, you can use one of the following resources:
+
+- [`c++-faq` tag on StackOverflow](https://stackoverflow.com/tags/c%2b%2b-faq/info)
+- [C++ FAQ from isocpp.com](https://isocpp.org/faq)
+- [CppReference](http://en.cppreference.com/) is a wiki reference to the C++ language and standard library
+- [C traps and pitfalls](http://www.slideshare.net/LegalizeAdulthood/c-traps-and-pitfalls-for-c-programmers) is useful if you are new to C++, but have programmed in C

cpp/hello-world/README.md

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+# Hello World
+
+Welcome to Hello World on Exercism's C++ Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+The classical introductory exercise.
+Just say "Hello, World!".
+
+["Hello, World!"][hello-world] is the traditional first program for beginning programming in a new language or environment.
+
+The objectives are simple:
+
+- Modify the provided code so that it produces the string "Hello, World!".
+- Run the test suite and make sure that it succeeds.
+- Submit your solution and check it at the website.
+
+If everything goes well, you will be ready to fetch your first real exercise.
+
+[hello-world]: https://en.wikipedia.org/wiki/%22Hello,_world!%22_program
+
+## Source
+
+### Created by
+
+- @samsondstl
+
+### Contributed to by
+
+- @elyashiv
+- @jackhughesweb
+- @KevinWMatthews
+- @patricksjackson
+- @sturzl
+
+### Based on
+
+This is an exercise to introduce users to using Exercism - https://en.wikipedia.org/wiki/%22Hello,_world!%22_program

cpp/hello-world/hello_world.cpp

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+#include "hello_world.h"
+
+using namespace std;
+
+namespace hello_world {
+
+string hello() { return "Goodbye, Mars!"; }
+
+}  // namespace hello_world

cpp/hello-world/hello_world.h

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+// This is an include guard.
+// You could alternatively use '#pragma once'
+// See https://en.wikipedia.org/wiki/Include_guard
+#if !defined(HELLO_WORLD_H)
+#define HELLO_WORLD_H
+
+// Include the string header so that we have access to 'std::string'
+#include <string>
+
+// Declare a namespace for the function(s) we are exporting.
+// https://en.cppreference.com/w/cpp/language/namespace
+namespace hello_world {
+
+// Declare the 'hello()' function, which takes no arguments and returns a
+// 'std::string'. The function itself is defined in the hello_world.cpp source
+// file. Because it is inside of the 'hello_world' namespace, it's full name is
+// 'hello_world::hello()'.
+std::string hello();
+
+}  // namespace hello_world
+
+#endif

cpp/hello-world/hello_world_test.cpp

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+// Include the header file with the definitions of the functions you create.
+#include "hello_world.h"
+
+// Include the test framework.
+#ifdef EXERCISM_TEST_SUITE
+#include <catch2/catch.hpp>
+#else
+#include "test/catch.hpp"
+#endif
+
+// Declares a single test.
+TEST_CASE("test_hello") {
+    // Check if your function returns "Hello, World!".
+    REQUIRE(hello_world::hello() == "Hello, World!");
+}

cpp/hello-world/test/tests-main.cpp

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+#define CATCH_CONFIG_MAIN
+#include "catch.hpp"