Arduino and decimal numbers

[miguelvp]

In that case, then use * for width and .* for precision so you can specify them on the fly

i.e.

sprintf(txt, "%*.*f", width, precision, val);

computing width and precision should be easy enough.

I think Arduino's printf doesn't support float formatting to save space by default, but there is a way to enable that functionality.

[f1rmb]

Yeah, there is no float support, this is why dtostrf()  exists.
Also, float are double on AVR.

Cheers.
---
Daniel

[alank2]

I have a library for AVR gcc that is a printf that will allow you to specify the decimal places.  An integer of 123 with decimal places would be printed to a string as "1.23".

http://www.avrfreaks.net/projects/decimal-integer-sprintf-library