The packages can be compiled with scalac lib.scala turing.scala abacus.scala recs.scala comp1.scalaIf you get an error, it is advisable to clean out the existing class-files rm */*.classAfter compilation, the examples can be run inthe REPL as well as in scala. For example scala ex.scalaor scala -cp $PWD ex.scalaThe directory can be cleaned with rm -rf *~ lib turing abacus comp1 comp2 recs