Undefined symbols for architecture x86_64 error?

The answer posted here: http://stackoverflow.com/a/312402/700926 is what I think you need.

The easiest and safest thing to do when using templates is always to put the class functions definition (implementation) inside the . Hpp file and not in a separate . Cpp file.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.