How can I searches files in current dir and the files in directories that under current dir?

When you do the recursive call to foo() inside the loop, notice that what direntp->d_name contains is not the full path, but just the subdirectory name. You have to concatenate it with currDir and use the result to call foo().

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.