Why aren't include guards or pragma once working?

Question

I\'m compiling some code that relies on include guards to prevent multiple definitions of objects and functions, but Visual Studio 2008 is giving me link errors that there are m

Answer 1

If you're getting linker errors... are you sure you're not 1) actually defining a function twice in code or 2) trying to do something silly like #include a source file (as opposed to a header file)?