Whenever I create a new .cpp/.h file in Xcode a comment is added to the top of the file. For example:
/*
* .cpp
*
*
First try changing your Name and Organization your contact card in Address Book.
If that doesn't work, open System Preferences > Users & Groups > Right click on your user (System Preferences must already be unlocked) > Advanced Options... > Change the name in the Full Name text box.
To change the organization name in Xcode click on the project file so it is selected (left sidebar of Xcode in the Project navigator) > In the File Inspector (right sidebar of Xcode) change the Organization text box.