Problem with localhost in help plss

i have my arcade script but i can open it in my localhost everytime in type http://localhost/arcade/index.php it display this error
Warning: Access denied for user 'root'@'localhost' (using password: NO) in c:\apache\htdocs\arcade1\config.php on line 16

Warning: MySQL Connection Failed: Access denied for user 'root'@'localhost' (using password: NO) in c:\apache\htdocs\arcade1\config.php on line 16

what is this error all about? help me plsss, thanks in advance

 

You need to set the username/password to access the MySQL database

 

im just new in this but how can i change my username and password? is it in the code? what particular code do i have to change it?

 

look for a config.php and you'll see the lines in there to enter the username/pass

 

Well if you have cpanel then you will have to make it first then add it to the database and then use it in any script