C: %5.2f within a print command, proceeded by extra space

idbruce

I do not know if this is the norm, but if you use %5.2f within a print command, the data is proceeded by a space.

I don't believe it would be the norm, so I am mentioning it as a heads up

However, my assumption could be wrong

ersmith

%5.2f has an explicit field with of 5 and precision of 2. If your number doesn't need that much room, it will be padded on the left with spaces. If you want it padded with 0 instead, use %05.2f. If you don't want any padding, don't give a field width (so just %.2f). This is the documented behavior of printf, which is covered in many places (both online and in books on C).

idbruce

ersmith

%5.2f has an explicit field with of 5 and precision of 2. If your number doesn't need that much room, it will be padded on the left with spaces. If you want it padded with 0 instead, use %05.2f. If you don't want any padding, don't give a field width (so just %.2f). This is the documented behavior of printf, which is covered in many places (both online and in books on C).

My bad. I really haven't done that much formatting in the past, except for time based strings. However as you point out, I am sure there is plenty of documentation. As much as I hate to admit it, programming microcontrollers is in many ways more complicated than writing a Windows program. There is so much to learn.

The %.2f format worked great. Thank you.

DavidZemon

ersmith wrote: »

If you don't want any padding, don't give a field width (so just %.2f)

Didn't know that. Thanks