feat: modify sample module to be MyFibonacci module (#60)

* feat: modify sample function to generate a Fibonacci sequence

* build: rename the sample project to `MyFibonacci`

Author: threeal

CMakeLists.txt

@@ -1,18 +1,18 @@
 cmake_minimum_required(VERSION 3.5)
 
-project(example)
+project(MyFibonacci)
 
 file(DOWNLOAD https://github.com/cpm-cmake/CPM.cmake/releases/download/v0.38.7/CPM.cmake
-     ${CMAKE_BINARY_DIR}/_deps/CPM.cmake
-     EXPECTED_MD5 14ea07dfb484cad5db4ee1c75fd6a911)
+     ${CMAKE_BINARY_DIR}/_deps/CPM.cmake EXPECTED_MD5 14ea07dfb484cad5db4ee1c75fd6a911)
 include(${CMAKE_BINARY_DIR}/_deps/CPM.cmake)
 cpmusepackagelock(package-lock)
 
 cpmgetpackage(CheckWarning.cmake)
 
-add_library(example src/example.cpp)
-target_include_directories(example PUBLIC include)
-target_check_warning(example)
+add_library(my_fibonacci src/sequence.cpp)
+target_include_directories(my_fibonacci PUBLIC include)
+set_property(TARGET my_fibonacci PROPERTY CXX_STANDARD 11)
+target_check_warning(my_fibonacci)
 
 if(CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
   cpmgetpackage(Format.cmake)
@@ -25,9 +25,9 @@ if(CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
 
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fprofile-arcs -ftest-coverage -fPIC -O0")
 
-    add_executable(example_test test/example_test.cpp)
-    target_link_libraries(example_test PRIVATE example Catch2::Catch2WithMain)
-    target_check_warning(example_test)
-    catch_discover_tests(example_test)
+    add_executable(my_fibonacci_test test/sequence_test.cpp)
+    target_link_libraries(my_fibonacci_test PRIVATE my_fibonacci Catch2::Catch2WithMain)
+    target_check_warning(my_fibonacci_test)
+    catch_discover_tests(my_fibonacci_test)
   endif()
 endif()

include/example/example.hpp

@@ -0,0 +1,9 @@
+#pragma once
+
+#include <vector>
+
+namespace my_fibonacci {
+
+std::vector<int> fibonacci_sequence(int n);
+
+}  // namespace my_fibonacci

include/my_fibonacci/sequence.hpp

@@ -0,0 +1,20 @@
+#include <my_fibonacci/sequence.hpp>
+
+namespace my_fibonacci {
+
+std::vector<int> fibonacci_sequence(int n) {
+  if (n <= 0) return {};
+  if (n == 1) return {1};
+
+  std::vector<int> sequence(n);
+  sequence[0] = 1;
+  sequence[1] = 1;
+
+  for (int i = 2; i < n; ++i) {
+    sequence[i] = sequence[i - 2] + sequence[i - 1];
+  }
+
+  return sequence;
+}
+
+}  // namespace my_fibonacci

src/example.cpp

@@ -0,0 +1,10 @@
+#include <catch2/catch_test_macros.hpp>
+#include <my_fibonacci/sequence.hpp>
+
+TEST_CASE("test fibonacci sequence") {
+  CHECK(my_fibonacci::fibonacci_sequence(-1) == std::vector<int>{});
+  CHECK(my_fibonacci::fibonacci_sequence(0) == std::vector<int>{});
+  CHECK(my_fibonacci::fibonacci_sequence(1) == std::vector<int>{1});
+  CHECK(my_fibonacci::fibonacci_sequence(2) == std::vector<int>{1, 1});
+  CHECK(my_fibonacci::fibonacci_sequence(5) == std::vector<int>{1, 1, 2, 3, 5});
+}