diff --git a/Sayan/lab1_hard_project/CMakeLists.txt b/Sayan/lab1_hard_project/CMakeLists.txt
new file mode 100644
index 0000000..29f7b7a
--- /dev/null
+++ b/Sayan/lab1_hard_project/CMakeLists.txt
@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.15...3.30)
+
+project(
+  lab1Example
+  VERSION 1.0
+  LANGUAGES CXX)
+
+add_library(HelloWorldlib STATIC src/hello_world.cpp include/hello_world.h)
+
+target_include_directories(HelloWorldlib PUBLIC include)
+
+# target_compile_features(HelloWorldlib PUBLIC cxx_std_11)
+
+add_executable(main src/main.cpp)
+
+target_link_libraries(main PUBLIC HelloWorldlib)
\ No newline at end of file
diff --git a/Sayan/lab1_hard_project/include/hello_world.h b/Sayan/lab1_hard_project/include/hello_world.h
new file mode 100644
index 0000000..d621ee6
--- /dev/null
+++ b/Sayan/lab1_hard_project/include/hello_world.h
@@ -0,0 +1,8 @@
+#pragma once
+// #include <iostream>
+
+class hello_world
+{
+public:
+    void static write_hello_world();
+};
\ No newline at end of file
diff --git a/Sayan/lab1_hard_project/src/hello_world.cpp b/Sayan/lab1_hard_project/src/hello_world.cpp
new file mode 100644
index 0000000..b00ff3c
--- /dev/null
+++ b/Sayan/lab1_hard_project/src/hello_world.cpp
@@ -0,0 +1,7 @@
+#include "/Users/sayandahiya/Desktop/Hytech/lab1_hard_project/include/hello_world.h"
+#include <iostream>
+
+void hello_world::write_hello_world()
+{
+    std::cout << "Hello World";
+}
\ No newline at end of file
diff --git a/Sayan/lab1_hard_project/src/main.cpp b/Sayan/lab1_hard_project/src/main.cpp
new file mode 100644
index 0000000..3e72325
--- /dev/null
+++ b/Sayan/lab1_hard_project/src/main.cpp
@@ -0,0 +1,7 @@
+
+#include </Users/sayandahiya/Desktop/Hytech/lab1_hard_project/include/hello_world.h>
+
+int main()
+{
+    hello_world::write_hello_world();
+}
\ No newline at end of file