Perhaps you are missing one of the linking parameters on the command line.
Since I actually don't agree to Lol4t0's opinion that this is too localized here is the ugly answer: Reinstalling G++ solved the problem.
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.