Namespaces and includes generate link error

Question

I was playing around with namespaces when I encountered a lnk2005 error. I can\'t figure out how to get around the error. Here\'s the error:

1>Source.obj :          


        

Answer 1

Everywhere you're including Chart.h, you're effectively dropping variables t, l, and d into those objects. Declare them as extern, then define them in Chart.cpp