It turns out that, there is another project OtherProject that includes class B and uses it's function bar() . I didn't read the error good enough and didn't notice that the linkage error occurs in another project. All I had to do is include A.
Cpp in OtherProject .
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.