How many constructor arguments is too many?

Question

Let\'s say you have a class called Customer, which contains the following fields:

• UserName
• Email
• First Name
• Last Name

Answer 1

If you have unpalatably many arguments, then just package them together into structs / POD classes, preferably declared as inner classes of the class you are constructing. That way you can still require the fields while making the code that calls the constructor reasonably readable.