JFLAGS = -g 
  JC = javac
  RM = rm -f
  .SUFFIXES: .java .class
  .java.class:
  	$(JC) $(JFLAGS) $*.java
  
  CLASSES = \
  	*.java \
  	Main.java
  
  default: classes
  
  classes: $(CLASSES:.java=.class)
  
  clean:
  	$(RM) *.class