"Giuseppe Bilotta" <[EMAIL PROTECTED]> wrote:
>
> TB> Now I was thinking where I could do so in TeX. (I think there are
> TB> macros in ConTeXt, but I cannot find them.)
>
> e-TeX has some arithmetic primitives. Don't know if they are
> somehow wrapped in ConTeXt, though.
It is rather straightforward in normal TeX as well, as long as they
are integers. Floats are a bit of a problem. For those, perhaps
a texutil plugin would be easier. Then again, that would alway
force another run.
Assuming integers, try this:
\def\mycalc#1#2#3{%
\count1=#1
\advance\count1 #2
\advance\count1 #3
\ifnum\count1 > 0
\count3=#1
\count5=#2
\multiply \count5 2
\advance\count3 \count5
\count5=#3
\multiply \count5 3
\advance\count3 \count5
%
\multiply\count3 10
\divide \count3 \count1
\expandafter\domycalc\the\count3\relax\quit
\else
--%
\fi
}
\def\domycalc#1#2\quit{%
\if#2\relax
.#1%
\else
#1\domycalc#2\quit%
\fi
}
\mycalc{1}{3}{5}
--
groeten,
Taco
