This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
So I've been trying to learn Objective-C, and yesterday I was looking at how inheritance works.
I created two classes, Person and Employee. The later is supposed to inherit from Person. The problem is that I'm getting this error "No visible @inerface for Employee" when I try to instantiate an Employee and set its weightInKilos or heightInMeters. Here are the header and implementation files: