Simple View Controller for beginners.

I know you all maybe masterminds of codeigniter but here i am talking about a person who is a serious beginner. I had find my answer by myself which is "Route.php". This is the main problem in my complete code. No one told me that i have to add a line of code in "config/route.php" to make my link work. Without route.php all the coding is just a waste of time.