Xcode telling me that I have an “Incomplete implementation?

Open the Issue navigator via the triangle/exclamation mark button at upper-left.

The initBoard method has different return type in m file. Also, Objective-C is case sensitive. PrintBoard and printboard are not equal for obj-c compiler.

BTW. You should use init... name only for constructors. See Naming Methods doc from Apple.

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.