Your current problem is that all of the various operator functions return an ostream& not an ostringstream& . You can solve that with a simple cast.
If you are willing to use some GCC extension, you could declare an actual ostringstream inside the macro in a block, so that the .str() method can be used without casting.
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.