The book shows an interactive session like this:
1↩ ok 1
2↩ ok 2
"Hello"↩ ok 4
'W'↩ ok 5
BYE↩
However, when I try this (on both macOS & Linux (Mint), I get the following:
~$ gforth
Gforth 0.7.3, Copyright (C) 1995-2008 Free Software Foundation, Inc.
Gforth comes with ABSOLUTELY NO WARRANTY; for details type `license'
Type `bye' to exit
1 ok
2 ok
"Hello"
:3: Undefined word
>>>"Hello"<<<
Backtrace:
$7FE7BE18FA68 throw
$7FE7BE1A5DF0 no.extensions
$7FE7BE18FD28 interpreter-notfound1
'W' ok
bye
~$ gforth -v
gforth 0.7.3
The stack depth isn’t displayed anymore, and entering a String (with more than one character) causes an error and a stack trace.
Is this a mistake in the book? A bug in the Forth implementation? A misunderstanding on my side?