Sample Makefile

  # This is a comment                                             (1)
  # Sample makefile                                               (2)

  CPP = /home/lacher/cop4530/cpp      #                           (3)
  
  exec: exec.o xfile.o                # dependency                (4)
      g++ -o exec exec.o xfile.o      # shell command (TAB req'd) (5)

  exec.o: exec.cpp xfile.h            # dependency                (6)
      g++ -c -I$(CPP) exec.cpp        # shell command             (7)

  xfile.o: xfile.h xfile.cpp          # dependency                (8)
      g++ -c -I$(CPP) xfile.cpp       # shell command             (9)