I tried to put 2 floating point numbers on the stack and was not even able to do that, let alone add them.
Perhaps the docs on types <http://www.complang.tuwien.ac.at/forth/gforth/Docs-html/Types-Tutorial.html#Types-Tutorial> which mentions, f+ needs an example? sh-3.2$ ./gforth Gforth 0.7.0, Copyright (C) 1995-2008 Free Software Foundation, Inc. Gforth comes with ABSOLUTELY NO WARRANTY; for details type `license' Type `bye' to exit 5.5 5.5 ok 2.2 2.2 ok .s .s <4> 55 0 22 0 ok f+ f+ :4: Floating-point stack underflow >>>f+<<< Backtrace: $7FBA2C08 throw .s .s <0> ok
