Stefan:
You should check closely into your compiler and linker options as described in the companion documentation. Sometimes it is possible to use Scanf and Printf in a manner wherein floating point support can be excluded but still allow these to work integer numbers.
Michael Karas

None the less you will take a big hit on FLASH code space using printf and scanf. Note that this is the case in any C programming environment but on a PC nobody seems to care if a program ends up 27K bytes bigger!!

Michael Karas