Nassi–Shneiderman diagram with plain TeX

Question

First I was trying to quickly put together a file/package that provides macros for building Nassi-Shneidermann diagrams, but after a while it gave me a head ache – literally.

So I decided to seek out a package on the internet, especially when I figured out that they are also called this, with no luck. I know of an existing package called stuki.sty, but that is for LaTeX, and I couldn't find the stuki.tex file that it was based on, as it mentioned by the author. Neither of these available as a package for download.

Is there any kind of package that provides similar?

Also if there is, is there a way to make the conditions one line with the true/false line, the separating lines not going all the way in the middle, like this, and not like this?

Answer 1

you can use \input pstricks.tex it is plain TeX compatible. Some flowcharts can be seen here: not really as a tabular like nassi-shneiderman, but it should be easy to realize. Here is a start for your example:

\input pstricks
\input pst-node

\pspicture(0,1)(10,-7)
\rput(5,0){\rnode{A}{\psframebox[framearc=0.3]{Your reall long text}}}
\rput(5,-1){\rnode{B}{\psframe(-5,0)(5,-1)\rput(0,-0.5){And the next one}}}
\ncline[arrowscale=2,arrows=->,angleA=-90,angleB=90]{A}{B}
\psframe(0,-1)(10,-7)      \rput(6,-2.5){foo}
\psline(1,-4)(1,-2)(10,-2) \rput(6,-3.5){bar}
\psline(1,-3)(10,-3)       \rput(6,-4.5){foo bar}
\psline(0,-4)(10,-4)
\psline(0,-5)(10,-5)
\endpspicture
\bye