trying TEMPLATE C

try/try_cmakelists2/CMakeLists.txt

@@ -0,0 +1,10 @@
+cmake_minimum_required(VERSION 3.20)
+project(geometries LANGUAGES CXX)
+
+add_executable(app)
+target_sources(app PRIVATE "app.cpp")
+target_include_directories(app PRIVATE "${PROJECT_SOURCE_DIR}")
+add_subdirectory("shape")
+add_subdirectory("square")
+install(TARGETS app)
+