chore(CMakeLists.txt): add references for arg_parser.c

Author: fUS1ONd

CMakeLists.txt

@@ -2,9 +2,7 @@ cmake_minimum_required(VERSION 3.7)
 project(sort_strings LANGUAGES C)
 
 set(CMAKE_C_STANDARD 99)
-
 set(ALGORITHMS bubble insertion merge radix quick)
-
 enable_testing()
 
 option(USE_MMAP "Use memory-mapped file I/O" OFF)
@@ -18,7 +16,15 @@ else()
     message(STATUS "Using standard file I/O")
 endif()
 
-add_executable(sort_strings src/sort_strings src/sortings.c src/comparators.c ${SOURCES})
+set(PROJECT_SOURCES
+    src/sort_strings.c
+    src/arg_parser.c
+    src/sortings.c
+    src/comparators.c
+    ${SOURCES}
+)
+
+add_executable(sort_strings ${PROJECT_SOURCES})
 
 target_include_directories(sort_strings PRIVATE ${CMAKE_SOURCE_DIR}/include)