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  1. or download this
    #define FOO "bar"
print qq(The value of FOO is "), FOO, qq("\n);
  2. or download this
    $ perl cpp.pl
The value of FOO is "FOO"
$ perl -P cpp.pl
The value of "bar"  is "FOO"
$
  3. or download this
    > perl -P cpp.pl
'cl' is not recognized as an internal or external command,
...
> perl -P cpp.pl
Command line error D2003 : missing source filename
>
  4. or download this
    $ perl -P cpp.pl
ngcc: -: No such file or directory
ngcc: No input files specified.
$