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Problem printing leading zeros using %w

 
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edhaslam



Joined: 15 Jul 2005
Posts: 89
Location: UK

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Problem printing leading zeros using %w
PostPosted: Wed Jun 27, 2007 3:36 am     Reply with quote
Hi,

I've got several signed int16s that I'm sending over a com port using the fprinf statement. In order to do this I'm use the following line:

Code:


fprintf(PORT2, "%3.1w %3.1w %3.1w \r", heading, pitch, roll);



However, the heading value can obviously be anything beween 0.0 and 359.9 and the pitch and roll values can be between -88.9 and 88.9. The problem is that they vary in length.

I'd like to fix the length of the values e.g 029.6 or 356.2 for the heading, and -19.5 or +09.5 for both the pitch and roll. Any idea how I might go about doing this using the %w print format?

Perhaps I need to just fix the length and print leading zeros for the heading e.g 029.5, and do a test for +/- and print those characters separately to the numerical value for the pitch and roll e.g. +01.4? Is there and easier way to do this rather than doing a test??

Many thanks,
Ed

PS: Using compiler version 3.235 and an 18F6722
edhaslam



Joined: 15 Jul 2005
Posts: 89
Location: UK

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PostPosted: Wed Jun 27, 2007 7:18 am     Reply with quote
Managed to fix it by getting the field length right and by using %lw Embarassed

It's nice when you work it out by yourself Idea Smile

(with a little help from this thread: http://www.ccsinfo.com/forum/viewtopic.php?t=30640&highlight=leading+zeros Twisted Evil Many thanks Ttelmah Smile Smile )
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