C++ xcode not letting me debug or run

[RoycemoreTech]

I am new to the whole area of programing. and I am trying to run a simple hello.cpp code that is in my C++ book. ( O'Reilly Practical C++ programing)
[ #include <iostream>

int main()
{
std::cout << "hello world\n";
return (0);
}]

When I try to open the hello.cpp code in xcode it will not let me run or debug or anything elce for that matter. is it possible to debug and run a code in xcode that was created in a text editor programmed?
or does it have to be created in xcode to run?