vpayno · vpayno · Jul 17, 2023 · Jul 17, 2023 · Jul 17, 2023 · Jul 17, 2023
diff --git a/cpp/README.md b/cpp/README.md
@@ -22,3 +22,7 @@
 - [vehicle-purchase](./vehicle-purchase/README.md)
 - [leap](./leap/README.md)
 - [darts](./darts/README.md)
+- [interest-is-interesting](./interest-is-interesting/README.md)
+- [reverse-string](./reverse-string/README.md)
+- [armstrong-numbers](./armstrong-numbers/README.md)
+- [bob](./bob/README.md)
diff --git a/cpp/armstrong-numbers/.exercism/config.json b/cpp/armstrong-numbers/.exercism/config.json
@@ -0,0 +1,26 @@
+{
+  "authors": [
+    "marvelou-s"
+  ],
+  "contributors": [
+    "elyashiv",
+    "KevinWMatthews",
+    "patricksjackson"
+  ],
+  "files": {
+    "solution": [
+      "armstrong_numbers.cpp",
+      "armstrong_numbers.h"
+    ],
+    "test": [
+      "armstrong_numbers_test.cpp"
+    ],
+    "example": [
+      ".meta/example.cpp",
+      ".meta/example.h"
+    ]
+  },
+  "blurb": "Determine if a number is an Armstrong number",
+  "source": "Wikipedia",
+  "source_url": "https://en.wikipedia.org/wiki/Narcissistic_number"
+}
diff --git a/cpp/armstrong-numbers/.exercism/metadata.json b/cpp/armstrong-numbers/.exercism/metadata.json
@@ -0,0 +1 @@
+{"track":"cpp","exercise":"armstrong-numbers","id":"941909d338374a82b67adee2646e5cbc","url":"https://exercism.org/tracks/cpp/exercises/armstrong-numbers","handle":"vpayno","is_requester":true,"auto_approve":false}
diff --git a/cpp/armstrong-numbers/CMakeLists.txt b/cpp/armstrong-numbers/CMakeLists.txt
@@ -0,0 +1,68 @@
+# 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}.hpp
+                             $<TARGET_OBJECTS:catchlib>)
+elseif(EXERCISM_TEST_SUITE)
+  # The Exercism test suite is being run, the Docker image already includes a
+  # pre-built version of Catch.
+  find_package(Catch2 REQUIRED)
+  add_executable(${exercise} ${file}_test.cpp ${exercise_cpp} ${file}.hpp)
+  target_link_libraries(${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}.hpp
+                             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(${exercise} PRIVATE EXERCISM_RUN_ALL_TESTS)
+endif()
+
+# Tell MSVC not to warn us about unchecked iterators in debug builds
+if(${MSVC})
+  set_target_properties(${exercise} PROPERTIES COMPILE_DEFINITIONS_DEBUG
+                                               _SCL_SECURE_NO_WARNINGS)
+endif()
+
+# Run the tests on every build
+add_custom_target(
+  test_${exercise} ALL
+  DEPENDS ${exercise}
+  COMMAND ${exercise})
diff --git a/cpp/armstrong-numbers/HELP.md b/cpp/armstrong-numbers/HELP.md
@@ -0,0 +1,55 @@
+# 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](https://exercism.io/tracks/cpp/tests) page for C++ on exercism.io.
+
+## 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.
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit armstrong_numbers.cpp armstrong_numbers.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)
+- [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
diff --git a/cpp/armstrong-numbers/Makefile b/cpp/armstrong-numbers/Makefile
@@ -0,0 +1,23 @@
+.PHONY: clean
+clean:
+	rm -rf ./build
+
+.PHONY: test
+test: clean
+	mkdir -pv ./build
+
+	@printf "\n"
+	@# each line is executed in a subshell, we have to daisy chain them so they
+	@# run in the build directory
+	cd ./build; export LDFLAGS="-lgcov --coverage" CXXFLAGS="--coverage"; cmake -DEXERCISM_RUN_ALL_TESTS=1 -DCMAKE_EXPORT_COMPILE_COMMANDS=1 -G 'Unix Makefiles' ../; if make; then printf "\n=== All Tests Passed ===\n"; else printf "\n=== Test Failure ===\n"; false; fi
+
+.PHONY: coverage
+coverage: test
+	@printf "\n"
+	find . -regextype posix-egrep -regex "^.*(tests-main|CompilerId).*[.](gcda|gcno)$$" -print -delete
+
+	@printf "\n"
+	find . -regextype posix-egrep -regex "^.*[.](gcda|gcno)27066"
+
+	@printf "\n"
+	gcovr --print-summary
diff --git a/cpp/armstrong-numbers/README.md b/cpp/armstrong-numbers/README.md
@@ -0,0 +1,40 @@
+# Armstrong Numbers
+
+Welcome to Armstrong Numbers on Exercism's C++ Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+An [Armstrong number][armstrong-number] is a number that is the sum of its own digits each raised to the power of the number of digits.
+
+For example:
+
+- 9 is an Armstrong number, because `9 = 9^1 = 9`
+- 10 is *not* an Armstrong number, because `10 != 1^2 + 0^2 = 1`
+- 153 is an Armstrong number, because: `153 = 1^3 + 5^3 + 3^3 = 1 + 125 + 27 = 153`
+- 154 is *not* an Armstrong number, because: `154 != 1^3 + 5^3 + 4^3 = 1 + 125 + 64 = 190`
+
+Write some code to determine whether a number is an Armstrong number.
+
+[armstrong-number]: https://en.wikipedia.org/wiki/Narcissistic_number
+
+## Source
+
+### Created by
+
+- @marvelou-s
+
+### Contributed to by
+
+- @elyashiv
+- @KevinWMatthews
+- @patricksjackson
+
+### Based on
+
+Wikipedia - https://en.wikipedia.org/wiki/Narcissistic_number
+
+### My Solution
+
+- [my solution]()
+- [run-tests](./run-tests-cpp.txt)
diff --git a/cpp/armstrong-numbers/armstrong_numbers.cpp b/cpp/armstrong-numbers/armstrong_numbers.cpp
@@ -0,0 +1,28 @@
+#include "armstrong_numbers.hpp"
+
+namespace armstrong_numbers {
+
+bool is_armstrong_number(int candidate) {
+    if (candidate < 10) {
+        return true;
+    }
+
+    const int digit_count = (int)std::log10(candidate) + 1;
+    int num = candidate;
+    int pow_total = 0;
+
+    while (num > 0) {
+        const int pow_temp = num % 10;
+        int pow_temp_total = 1;
+
+        for (int i = 0; i < digit_count; i++) {
+            pow_temp_total *= pow_temp;
+        }
+        pow_total += pow_temp_total;
+        num /= 10;
+    }
+
+    return pow_total == candidate;
+}
+
+} // namespace armstrong_numbers
diff --git a/cpp/armstrong-numbers/armstrong_numbers.hpp b/cpp/armstrong-numbers/armstrong_numbers.hpp
@@ -0,0 +1,12 @@
+#if !defined(ARMSTRONG_NUMBERS_H)
+#define ARMSTRONG_NUMBERS_H
+
+#include <cmath>
+
+namespace armstrong_numbers {
+
+    bool is_armstrong_number(int candidate);
+
+} // namespace armstrong_numbers
+
+#endif // ARMSTRONG_NUMBERS_H
diff --git a/cpp/armstrong-numbers/armstrong_numbers.plist b/cpp/armstrong-numbers/armstrong_numbers.plist
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+ <key>clang_version</key>
+<string>Debian clang version 16.0.6 (++20230610113348+7cbf1a259152-1~exp1~20230610233446.99)</string>
+ <key>diagnostics</key>
+ <array>
+ </array>
+ <key>files</key>
+ <array>
+ </array>
+</dict>
+</plist>
diff --git a/cpp/armstrong-numbers/armstrong_numbers_test.cpp b/cpp/armstrong-numbers/armstrong_numbers_test.cpp
@@ -0,0 +1,46 @@
+#ifdef EXERCISM_TEST_SUITE
+#include <catch2/catch.hpp>
+#else
+#include "test/catch.hpp"
+#endif
+#include "armstrong_numbers.hpp"
+
+// Armstrong-numbers exercise test case data version 1.1.0
+
+TEST_CASE("zero_is_an_armstrong_number") {
+    REQUIRE(armstrong_numbers::is_armstrong_number(0));
+}
+
+#if defined(EXERCISM_RUN_ALL_TESTS)
+TEST_CASE("single_digit_numbers_are_armstrong_numbers") {
+    REQUIRE(armstrong_numbers::is_armstrong_number(5));
+}
+
+TEST_CASE("there_are_no_2_digit_armstrong_numbers") {
+    REQUIRE_FALSE(armstrong_numbers::is_armstrong_number(10));
+}
+
+TEST_CASE("three_digit_number_that_is_an_armstrong_number") {
+    REQUIRE(armstrong_numbers::is_armstrong_number(153));
+}
+
+TEST_CASE("three_digit_number_that_is_not_an_armstrong_number") {
+    REQUIRE_FALSE(armstrong_numbers::is_armstrong_number(100));
+}
+
+TEST_CASE("four_digit_number_that_is_an_armstrong_number") {
+    REQUIRE(armstrong_numbers::is_armstrong_number(9474));
+}
+
+TEST_CASE("four_digit_number_that_is_not_an_armstrong_number") {
+    REQUIRE_FALSE(armstrong_numbers::is_armstrong_number(9475));
+}
+
+TEST_CASE("seven_digit_number_that_is_an_armstrong_number") {
+    REQUIRE(armstrong_numbers::is_armstrong_number(9926315));
+}
+
+TEST_CASE("seven_digit_number_that_is_not_an_armstrong_number") {
+    REQUIRE_FALSE(armstrong_numbers::is_armstrong_number(9926314));
+}
+#endif // !EXERCISM_RUN_ALL_TESTS
diff --git a/cpp/armstrong-numbers/armstrong_numbers_test.plist b/cpp/armstrong-numbers/armstrong_numbers_test.plist
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+ <key>clang_version</key>
+<string>Debian clang version 16.0.6 (++20230610113348+7cbf1a259152-1~exp1~20230610233446.99)</string>
+ <key>diagnostics</key>
+ <array>
+ </array>
+ <key>files</key>
+ <array>
+ </array>
+</dict>
+</plist>
diff --git a/cpp/armstrong-numbers/compile_commands.json b/cpp/armstrong-numbers/compile_commands.json
@@ -0,0 +1,17 @@
+[
+{
+  "directory": "/home/vpayno/git_vpayno/exercism-workspace/cpp/armstrong-numbers/build",
+  "command": "/usr/bin/c++ -DEXERCISM_RUN_ALL_TESTS  -g -Wall -Wextra -Wpedantic -Werror -std=c++17 -o CMakeFiles/armstrong-numbers.dir/armstrong_numbers_test.cpp.o -c /home/vpayno/git_vpayno/exercism-workspace/cpp/armstrong-numbers/armstrong_numbers_test.cpp",
+  "file": "/home/vpayno/git_vpayno/exercism-workspace/cpp/armstrong-numbers/armstrong_numbers_test.cpp"
+},
+{
+  "directory": "/home/vpayno/git_vpayno/exercism-workspace/cpp/armstrong-numbers/build",
+  "command": "/usr/bin/c++ -DEXERCISM_RUN_ALL_TESTS  -g -Wall -Wextra -Wpedantic -Werror -std=c++17 -o CMakeFiles/armstrong-numbers.dir/armstrong_numbers.cpp.o -c /home/vpayno/git_vpayno/exercism-workspace/cpp/armstrong-numbers/armstrong_numbers.cpp",
+  "file": "/home/vpayno/git_vpayno/exercism-workspace/cpp/armstrong-numbers/armstrong_numbers.cpp"
+},
+{
+  "directory": "/home/vpayno/git_vpayno/exercism-workspace/cpp/armstrong-numbers/build",
+  "command": "/usr/bin/c++ -DEXERCISM_RUN_ALL_TESTS  -g -Wall -Wextra -Wpedantic -Werror -std=c++17 -o CMakeFiles/armstrong-numbers.dir/test/tests-main.cpp.o -c /home/vpayno/git_vpayno/exercism-workspace/cpp/armstrong-numbers/test/tests-main.cpp",
+  "file": "/home/vpayno/git_vpayno/exercism-workspace/cpp/armstrong-numbers/test/tests-main.cpp"
+}
+]
diff --git a/cpp/armstrong-numbers/compile_flags.txt b/cpp/armstrong-numbers/compile_flags.txt
@@ -0,0 +1,8 @@
+-std=c++17
+-stdlib=libstdc++
+-g
+-Wall
+-Wextra
+-Wpedantic
+-Werror
+-Wno-unused-parameter