$ echo|perl -0pe 'print ord $/'
0
$ echo|perl -08pe 'print ord $/'
Unrecognized switch: -8peprint ord $/ (-h will show valid options).
$ echo|perl -0377pe 'print ord $/'
255
$ echo|perl -p0377e 'print ord $/'
255
$ echo|perl -0400pe 'print ord $/'
0
$ echo|perl -0401pe 'print ord $/'
0
$ echo|perl -0ep 'print ord $/'
$ echo|perl -e0p 'print ord $/'
Bareword found where operator expected at -e line 1, near "0p"
(Missing operator before p?)
syntax error at -e line 1, next token ???
Execution of -e aborted due to compilation errors.
$ echo|perl -ep0 'print ord $/'
$ echo|perl -pe0 'print ord $/'
Can't open print ord $/: そのようなファイルやディレクトリはありません.