Write a program in your favorite scripting language to remove comments from programs in the calculator language (Example 2.9).  Build a nested-case-statements finite automaton that converts all...

Write a program in your favorite scripting language to remove comments

from programs in the calculator language (Example 2.9).

 Build a nested-case-statements finite automaton that converts all letters in

its input to lower case, except within Pascal-style comments and strings. A

Pascal comment is delimited by { and }, or by (* and *). Comments do

not nest. A Pascal string is delimited by single quotes (‚ ... ‚). A quote

character can be placed in a string by doubling it (‚

Madam, I‚‚m Adam.‚).

This upper-to-lower mapping can be useful if feeding a program written

in standard Pascal (which ignores case) to a compiler that considers upperand lowercase letters to be distinct.