diff --git a/Development Guidelines.md b/Development Guidelines.md
new file mode 100644
index 0000000..509a111
--- /dev/null
+++ b/Development Guidelines.md	
@@ -0,0 +1,23 @@
+1.No "using namespace std;"
+
+2.Clearly declare "private" inside of class. For example:
+
+use class item{
+    private:
+    int price;
+    public:
+    getPrice();
+}
+
+instead of class item{
+    int price
+    public:
+    getprice();
+}
+
+
+3.Declare inheritance type(public, private, protected) when using inheritance.
+
+4.If not finished with code, add a TODO as comments.
+
+5.Add comments to explain what you want to do.
\ No newline at end of file
diff --git a/main.cpp b/main.cpp
index 3a1b619..e8f50cf 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,9 +1,9 @@
 #include<iostream>
 
 class item{
-    private:
-    
     public:
+    
+    private:
 
 };