Hi all, On Mon, Sep 1, 2014 at 6:05 AM, Tomas Hlavaty <t...@logand.com> wrote: >> : (* 1.0 1.0) >> -> 100 > > You want: (*/ 1.0 1.0 1.0), see http://software-lab.de/doc/ref_.html#*/

That's funny because I read about */ right before posting my email but couldn't connect with my problem. If there is room for clarification, here is my suggestion: «…by multiplying with (or dividing by) the scale factor.» could become «…by multiplying with (or dividing by) the scale factor, which is always `1.0`.» Suggested examples: : (scl 1) -> 1 : 1.0 -> 10 : (* 1.0 1.0) -> 100 : (*/ 1.0 1.0 1.0) -> 10 On Mon, Sep 1, 2014 at 6:23 AM, Alexander Burger <a...@software-lab.de> wrote: > > The solution would be to extend the internal representation of numbers, > e.g. with an additional bit to distinguish between non-scaled and scaled > integers. I guess that you don't plan to alter PicoLisp this way. And there is no magic way to alter the reader, or from Lisp? > In fact, I would not try to explain it with these examples, but > work _only_ with scaled integers first. Should be no problem for > you as a math teacher. > And then explain that the dot is just a read macro, not part of > the language machinery per se. My strategy for now is to only work with integers first, even with /. Then explain that if decimals are needed, a scale must be choosen, and numbers must be entered with a dot, or they will be read as tenths for a scale of 1, millionths for a scale of 6… I'll try to show, for a scale of 1, «1» instead of «10» using 'format cleverly. chri -- http://profgra.org/lycee/ (site pro) http://delicious.com/profgraorg (liens, favoris) https://twitter.com/profgraorg http://microalg.info -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe