I've been doing some coding recently and all of a sudden my code goes haywire, everything stops being found, but there seems to be one thing that will never be found, the xutility document, I try to include the file as such:

#include <direct.h>
#include <utility>
#include <fstream>
#include <string>
#include <climits>
#include <memory>
#include <stdexcept>
#include <xutility>

and the outcome comes to this:

According to this thread xutility is a helper used in a particular book. You will have to get that file and then configure your compiler to find it by placing it in a location that is already searched for includes or adding a new include directory. How to do that will depend on which compiler and/or IDE you are using.