Problem2.cpp should just build on any machine.
  Signal handling is the same on Windows and non-Windows machines.

Problem1.cpp and Problem3.cpp are threaded, but should
  just build and work on Windows machines.  They include the 
  threading routines in osl/porthread.h and .cpp.
  On Linux or Mac OS X machines, they've got to be linked 
  with the pthread library "-lpthread", like
	g++ problem3.cpp -o problem3 -lpthread -I.