To run the parser and pretty printer, do the following:

1) edit the "sources.cm" file and set the path to ml-yacc

2) start SML

3) at the prompt, type ``CM.make();'' to run the compilation manager

4) at the prompt, type: ``main.test "program.imp";'' to parse and
   print the sample program from file "program.imp"

5) type Ctrl-D to exit SML.