diff --git a/.vscode/c_cpp_properties.json b/.vscode/c_cpp_properties.json
new file mode 100644
index 0000000..38f7d0a
--- /dev/null
+++ b/.vscode/c_cpp_properties.json
@@ -0,0 +1,20 @@
+{
+    "configurations": [
+        {
+            "name": "Win32",
+            "includePath": [
+                "${workspaceFolder}/**"
+            ],
+            "defines": [
+                "_DEBUG",
+                "UNICODE",
+                "_UNICODE"
+            ],
+            "compilerPath": "C:\\Program Files\\mingw64\\bin\\gcc.exe",
+            "cStandard": "c23",
+            "cppStandard": "c++17",
+            "intelliSenseMode": "gcc-x64"
+        }
+    ],
+    "version": 4
+}
\ No newline at end of file
diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..5c7247b
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,7 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": []
+}
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..6848ac3
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,77 @@
+{
+    "files.associations": {
+        "array": "cpp",
+        "atomic": "cpp",
+        "*.tcc": "cpp",
+        "cctype": "cpp",
+        "clocale": "cpp",
+        "cmath": "cpp",
+        "cstdarg": "cpp",
+        "cstddef": "cpp",
+        "cstdint": "cpp",
+        "cstdio": "cpp",
+        "cstdlib": "cpp",
+        "cwchar": "cpp",
+        "cwctype": "cpp",
+        "deque": "cpp",
+        "unordered_map": "cpp",
+        "vector": "cpp",
+        "exception": "cpp",
+        "algorithm": "cpp",
+        "memory": "cpp",
+        "memory_resource": "cpp",
+        "optional": "cpp",
+        "string": "cpp",
+        "string_view": "cpp",
+        "system_error": "cpp",
+        "tuple": "cpp",
+        "type_traits": "cpp",
+        "utility": "cpp",
+        "fstream": "cpp",
+        "initializer_list": "cpp",
+        "iosfwd": "cpp",
+        "iostream": "cpp",
+        "istream": "cpp",
+        "limits": "cpp",
+        "new": "cpp",
+        "ostream": "cpp",
+        "sstream": "cpp",
+        "stdexcept": "cpp",
+        "streambuf": "cpp",
+        "typeinfo": "cpp",
+        "cfenv": "cpp",
+        "map": "cpp",
+        "chrono": "cpp",
+        "codecvt": "cpp",
+        "ctime": "cpp",
+        "ratio": "cpp",
+        "iomanip": "cpp",
+        "bitset": "cpp",
+        "variant": "cpp",
+        "typeindex": "cpp",
+        "charconv": "cpp",
+        "cinttypes": "cpp",
+        "complex": "cpp",
+        "condition_variable": "cpp",
+        "csetjmp": "cpp",
+        "csignal": "cpp",
+        "cstring": "cpp",
+        "cuchar": "cpp",
+        "forward_list": "cpp",
+        "list": "cpp",
+        "unordered_set": "cpp",
+        "functional": "cpp",
+        "iterator": "cpp",
+        "numeric": "cpp",
+        "random": "cpp",
+        "regex": "cpp",
+        "set": "cpp",
+        "future": "cpp",
+        "mutex": "cpp",
+        "scoped_allocator": "cpp",
+        "shared_mutex": "cpp",
+        "thread": "cpp",
+        "valarray": "cpp"
+    },
+    "C_Cpp.errorSquiggles": "disabled"
+}
\ No newline at end of file
diff --git a/.vscode/tasks.json b/.vscode/tasks.json
new file mode 100644
index 0000000..6db2949
--- /dev/null
+++ b/.vscode/tasks.json
@@ -0,0 +1,29 @@
+{
+	"version": "2.0.0",
+	"tasks": [
+		{
+			"type": "cppbuild",
+			"label": "C/C++: g++.exe build active file",
+			"command": "C:\\Program Files\\mingw64\\bin\\g++.exe",
+			"args": [
+				"-fdiagnostics-color=always",
+				"-g",
+				"${file}",
+				"-o",
+				"${fileDirname}\\${fileBasenameNoExtension}.exe",
+				"-std=c++2a"
+			],
+			"options": {
+				"cwd": "${fileDirname}"
+			},
+			"problemMatcher": [
+				"$gcc"
+			],
+			"group": {
+				"kind": "build",
+				"isDefault": true
+			},
+			"detail": "compiler: \"C:\\Program Files\\mingw64\\bin\\g++.exe\""
+		}
+	]
+}
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index cdec6a4..a1cf20c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,26 +1,42 @@
 # 为什么不指定 cmake_minimum_required 会导致下面在 project 处出错？
-#cmake_minimum_required(VERSION 3.10)
+cmake_minimum_required(VERSION 3.10)
 
-project(hellocmake VERSION 3.1.4 LANGUAGES CXX)
+project(hellocmake VERSION 3.1.4 LANGUAGES CXX C)
 
 # 如何让构建类型默认为 Release？
 #set(CMAKE_BUILD_TYPE Release)
 
-# 这样设置 C++14 的方式对吗？请改正
-set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "-std=c++14")
+if (NOT CMAKE_BUILD_TYPE)
+    set(CMAKE_BUILD_TYPE Release)
+endif()
 
+# 这样设置 C++14 的方式对吗？请改正
+# set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "-std=c++14")
+set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS ON)
 # （可选）使用 ccache 加速编译
 find_program(CCACHE_PROGRAM ccache)
+if (CCACHE_PROGRAM)
+    message(STATUS "Found CCache: ${CCACHE_PROGRAM}")
+    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ${CCACHE_PROGRAM})
+    set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ${CCACHE_PROGRAM})
+else()
+    message("CCache not found")
+endif()
 
 # legacy/CMakeLists.txt 和 mylib/CMakeLists.txt 里还有问题哦！
 add_subdirectory(legacy)
 add_subdirectory(mylib)
 
 # 这样需要一个个写出所有文件很麻烦，请改成自动批量添加源文件
-set(main_sources "src/main.cpp" "src/other.cpp" "src/dummy.cpp" "src/veryusefulfile.cpp")
+# set(main_sources "src/main.cpp" "src/other.cpp" "src/dummy.cpp" "src/veryusefulfile.cpp")
+file(GLOB_RECURSE main_sources CONFIGURE_DEPENDS src/*.cpp )  
 add_executable(main ${main_sources})
 
-# 请改为项目的正确版本（用变量来获取）
-target_compile_definitions(main PRIVATE HELLOCMAKE_VERSION="233.33.33")
+target_link_libraries(main PRIVATE mylib)
 
+# 请改为项目的正确版本（用变量来获取）
+# target_compile_definitions(main PRIVATE HELLOCMAKE_VERSION="233.33.33")
+target_compile_definitions(main PRIVATE HELLOCMAKE_VERSION=${PROJECT_VERSION})
 # （可选）添加 run 作为伪目标方便命令行调用
diff --git a/mylib/CMakeLists.txt b/mylib/CMakeLists.txt
index f25aeef..5f31294 100644
--- a/mylib/CMakeLists.txt
+++ b/mylib/CMakeLists.txt
@@ -1,9 +1,21 @@
 # 请改用自动批量查找所有 .cpp 和 .h 文件：
-set(mylib_sources "mylib/mylib.cpp" "mylib/mylib.h")
+# set(mylib_sources "mylib/mylib.cpp" "mylib/mylib.h")
+
+file(GLOB_RECURSE mylib_sources CONFIGURE_DEPENDS mylib/*.cpp  mylib/*.h) 
 
 # 使用 SHARED 在 Windows 上会遇到什么困难？请尝试修复!
 add_library(mylib SHARED ${mylib_sources})
+set_property(TARGET mylib PROPERTY RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR})
+set_property(TARGET mylib PROPERTY ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR})
+set_property(TARGET mylib PROPERTY LIBRARY_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR})
+set_property(TARGET mylib PROPERTY RUNTIME_OUTPUT_DIRECTORY_DEBUG ${PROJECT_BINARY_DIR})
+set_property(TARGET mylib PROPERTY ARCHIVE_OUTPUT_DIRECTORY_DEBUG ${PROJECT_BINARY_DIR})
+set_property(TARGET mylib PROPERTY LIBRARY_OUTPUT_DIRECTORY_DEBUG ${PROJECT_BINARY_DIR})
+set_property(TARGET mylib PROPERTY RUNTIME_OUTPUT_DIRECTORY_RELEASE ${PROJECT_BINARY_DIR})
+set_property(TARGET mylib PROPERTY ARCHIVE_OUTPUT_DIRECTORY_RELEASE ${PROJECT_BINARY_DIR})
+set_property(TARGET mylib PROPERTY LIBRARY_OUTPUT_DIRECTORY_RELEASE ${PROJECT_BINARY_DIR})
+
 target_compile_definitions(mylib PRIVATE MYLIB_EXPORT)
 
 # 这里应该用 PRIVATE 还是 PUBLIC？
-target_include_directories(mylib PRIVATE .)
+target_include_directories(mylib PUBLIC .)