Re: [Chicken-users] From inexact to exact using the "-" procedure?

[John Cowan]

Jeronimo Pellegrini scripsit:

> #;5> (- a b)
> 1.0

The imaginary part vanishes because R5RS treats 1.0+0.0i as a real number.
However, R6RS does not and R7RS currently does not either, though that
may change as a result of a current debate.  The rationale is that you
don't know if the complex number is actually on the real line or just
too close to it to discriminate.

-- 
Overhead, without any fuss, the stars were going out.
        --Arthur C. Clarke, "The Nine Billion Names of God"
                John Cowan <address@hidden>