RFC: 6178739 - Formatter - Zero padding flag with zero width (original) (raw)

Brian Burkhalter brian.burkhalter at oracle.com
Wed Jun 26 17:31:28 UTC 2013

On Jun 26, 2013, at 9:37 AM, Joe Darcy wrote:

Specifically, I was referred to how C handles "%0.4f\n".

On 6/24/2013 12:56 PM, Brian Burkhalter wrote:

By way of comparison, this C code printf("%1.4f\n", 56789.456789F); printf("%0.4f\n", 56789.456789F); prints this output 56789.4570 56789.4570 ^ ^ ^ ^ ^ ^ ^ ^ Like this.

It looks like it interprets the "0" as zero width, ignoring it as a flag. This appears contrary to the description of width in [1]:

"A leading zero in the width value is interpreted as the zero-padding flag mentioned above […]."

Thanks,

Brian

[1] https://en.wikipedia.org/wiki/Printf#Format_placeholders

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