Working the correct way.

Assignment2/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.14)
+project(Assignment2)
+
+set(CMAKE_CXX_STANDARD 17)
+set(SOURCE_FILES
+        Assignment2.cpp)
+add_executable(hw Assignment2.cpp)
+add_executable(RandDistributions ${SOURCE_FILES})
+
+if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
+    target_compile_options(RandDistributions PRIVATE /W4 /permissive-)
+elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+    target_compile_options(RandDistributions PRIVATE -Wall -Wextra -pedantic)
+endif()
+
+find_program(CLANG_FORMAT "clang-format")
+if(CLANG_FORMAT)
+    unset(SOURCE_FILES_PATHS)
+    foreach(SOURCE_FILE ${SOURCE_FILES})
+        get_source_file_property(WHERE ${SOURCE_FILE} LOCATION)
+        set(SOURCE_FILES_PATHS ${SOURCE_FILES_PATHS} ${WHERE})
+    endforeach()
+
+    add_custom_target(
+            ClangFormatCOMMAND
+            ${CLANG_FORMAT}
+            -i
+            -style=file
+            ${SOURCE_FILES_PATHS})
+    add_dependencies(Assignment2 ClangFormat)
+endif()