There is, of course, the putrid and horrible, yet sublimely simple additive solution... 
print "print an example of negative zero\n";
@range = (-0.0000001, -0.000001, -0.00001, -0.0001);

foreach $example (@range)
{
    $tret = sprintf("rounded float:%7.5f, other:%7.5e",$example+.00000
+4,$example);
    
    print "The Number $example is represented as $tret\n";
}

[download]
Update: .000004 not .0000009 actually seems to work

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In reply to Re: Negative zero? There's gotta be a sprintf that undoes that, right? by suaveant
in thread Negative zero? There's gotta be a sprintf that undoes that, right? by rgiskard

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