diff --git a/arithmetic.cpp b/arithmetic.cpp
index 0fcfec5..8baf64c 100644
--- a/arithmetic.cpp
+++ b/arithmetic.cpp
@@ -1,4 +1,4 @@
-#include arithmetic.h
+#include "arithmetic.h"
 
 int add(int a, int b)
 {
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..c291313
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,10 @@
+#include <iostream>
+#include "arithmetic.h"
+int main()
+{
+
+	std::cout<<"Hello world!"<<std::endl;
+	std::cout<<"c="<<add(1,2)<<std::endl;
+	
+	return 0;
+}