diff --git a/.gitignore b/.gitignore
index 01f9cb9..a7ac0f8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 build/
-.vscode/
\ No newline at end of file
+.vscode/
+.idea/
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c42269d..cb62f35 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,5 +12,9 @@ include_directories(
     ${PROJECT_SOURCE_DIR}/include/
 )
 
+add_subdirectory(lib)
+
 # 产生可执行文件
-add_executable(bus src/main.c)
+add_executable(bus main.c)
+
+target_link_libraries(bus bus_lib)
\ No newline at end of file
diff --git a/include/example.h b/include/example.h
new file mode 100644
index 0000000..2a6d781
--- /dev/null
+++ b/include/example.h
@@ -0,0 +1,11 @@
+//
+// Created by ricardo on 2022/4/29.
+//
+
+#ifndef AUTO_PILOT_BUS_EXAMPLE_H
+#define AUTO_PILOT_BUS_EXAMPLE_H
+
+#include "stdio.h"
+
+void print(char* str);
+#endif //AUTO_PILOT_BUS_EXAMPLE_H
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
new file mode 100644
index 0000000..26097d7
--- /dev/null
+++ b/lib/CMakeLists.txt
@@ -0,0 +1,5 @@
+aux_source_directory(. LIB_SRCS)
+
+include_directories(../include)
+
+add_library(bus_lib ${LIB_SRCS})
\ No newline at end of file
diff --git a/lib/example.c b/lib/example.c
new file mode 100644
index 0000000..219d245
--- /dev/null
+++ b/lib/example.c
@@ -0,0 +1,9 @@
+//
+// Created by ricardo on 2022/4/29.
+//
+#include "example.h"
+
+void print(char* str)
+{
+    printf("%s", str);
+}
\ No newline at end of file
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..4689e2f
--- /dev/null
+++ b/main.c
@@ -0,0 +1,8 @@
+#include "example.h"
+
+int main()
+{
+    char* string = "Good morning!\n";
+    print(string);
+    return 0;
+}
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
deleted file mode 100644
index 2a42e93..0000000
--- a/src/main.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <stdio.h>
-
-int main()
-{
-    printf("good night!\n");
-    return 0;
-}
\ No newline at end of file