diff --git a/homework3/CMakeLists.txt b/homework3/CMakeLists.txt
index 7806f16..eae6355 100644
--- a/homework3/CMakeLists.txt
+++ b/homework3/CMakeLists.txt
@@ -7,3 +7,4 @@ add_executable(test1
         Stack.h
         Stack.cpp
         test1.cpp)
+add_executable(test2 test2.cpp)
diff --git a/homework3/Stack.cpp b/homework3/Stack.cpp
index b6766df..594e04a 100644
--- a/homework3/Stack.cpp
+++ b/homework3/Stack.cpp
@@ -1,3 +1,4 @@
+//Stack.cpp
 #include "Stack.h"
 #include<iostream>
 
diff --git a/homework3/Stack.h b/homework3/Stack.h
index 62a8fd5..0161e5b 100644
--- a/homework3/Stack.h
+++ b/homework3/Stack.h
@@ -1,3 +1,4 @@
+//Stack.h
 #ifndef STACK_H
 #define STACK_H
 
diff --git a/homework3/test1.cpp b/homework3/test1.cpp
index d6f5983..9e1065c 100644
--- a/homework3/test1.cpp
+++ b/homework3/test1.cpp
@@ -1,3 +1,4 @@
+//test1.cpp
 #include"Stack.h"
 #include<iostream>
 using namespace std;
diff --git a/homework3/test2.cpp b/homework3/test2.cpp
new file mode 100644
index 0000000..98f114b
--- /dev/null
+++ b/homework3/test2.cpp
@@ -0,0 +1,8 @@
+//test2.cpp
+#include<iostream>
+
+using namespace std;
+
+int main() {
+    return 0;
+}