because the z80-version of the sprintf only supports
sprintf with int-variables I wrote a sprintf-version, which
includes the usual formats like "%3.2f", "%4.4g" and so
on. The program is written completely in C. So it can be
used at any processor. But it doesn't support doubles,
only floats. And it doesn't support "\n" and "\t".
Because it is written in C, it takes some memory.
To make a difference, I named the function as "sprintff