Hmm... Then I think the sprintf documentation is incorrect, or possibly just confusing: (emphasis mine)
Perl does its own "sprintf" formatting--it emulates the C function "sprintf", but it doesn't use it (except for floating- point numbers, and even then only the standard modifiers are allowed). As a result, any non-standard extensions in your local "sprintf" are not available from Perl.
"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re^3: sprintf rounding convention by Joost
in thread sprintf rounding convention by jagaranga

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