diff --git a/src/Ch00/CodeDemo.cpp b/src/Ch00/CodeDemo.cpp
index 2613d2c3..9c8dfc1a 100644
--- a/src/Ch00/CodeDemo.cpp
+++ b/src/Ch00/CodeDemo.cpp
@@ -17,5 +17,5 @@ int main(){
     std::cout << "The result of the addition is " << result << std::endl;
     
     std::cout << std::endl << std::endl;
-    return (0);
+    return (0); // my comment
 }
diff --git a/src/Ch03/03_03b/CodeDemo.cpp b/src/Ch03/03_03b/CodeDemo.cpp
index 662b1b0a..8fbbe59c 100644
--- a/src/Ch03/03_03b/CodeDemo.cpp
+++ b/src/Ch03/03_03b/CodeDemo.cpp
@@ -9,18 +9,22 @@ enum class cow_purpose {dairy, meat, hide, pet};
 
 class cow{
 public:
-    cow(std::string name_i, int age_i, cow_purpose purpose_i){
+    cow(std::string name_i, int age_i, cow_purpose purpose_i)
+    {
         name = name_i;
         age = age_i;
         purpose = purpose_i;
     }
-    std::string get_name() const{
+    std::string get_name() const
+    {
         return name;
     }
-    int get_age() const{
+    int get_age() const
+    {
         return age;
     }
-    cow_purpose get_purpose() const{
+    cow_purpose get_purpose() const
+    {
         return purpose;
     }
 private:
@@ -29,11 +33,12 @@ class cow{
     cow_purpose purpose;
 };
 
-int main(){
-    cow my_cow;
-    my_cow.age = 5;
-    my_cow.name = "Betsy";
-    my_cow.purpose = cow_purpose::dairy;
+int main()
+{
+    cow my_cow( "Betsy",  5, cow_purpose::dairy);
+   // my_cow.age = 5;
+   // my_cow.name = "Betsy";
+   //  my_cow.purpose = cow_purpose::dairy;
     std::cout << my_cow.name << " is a type-" << (int)my_cow.purpose << " cow." << std::endl;
     std::cout << my_cow.name << " is " << my_cow.age << " years old." << std::endl;