---- Lawrence Bottorff <borg...@gmail.com> wrote: > With guile (and a few other Schemes/Lisps) you can directly add fractions > or rational numbers: > > (+ 1/2 1/12) > => 7/12 > > It's like magic, no? Anyway, I'm trying -- for educational purposes -- to > reproduce this functionality. But right out of the blocks I'm stuck trying > to figure out how to handle incoming parameters. So far I've got > > (define (myrat a b) > . . .) > > (define (myrat a b c d) > . . .) > > where numerator and denominator are given separately, as well as > > (define (myrat . fracparams) > . . .) > > which still has my basic problem, namely, can one parameter hold both parts > of a rational number, then allow the numerator and denominator to be peeled > off and worked on, i.e., something like > > (let ((num1 numepeeler(a)) > (denom1 denompeeler(a) > > > LB
This https://mitpress.mit.edu/sicp/full-text/book/book-Z-H-14.html might be enlightening.... -Dale
