On Oct 31, 2008, at 3:52 PM, Jean-Nicolas Jolivet wrote:
I'm having an interesting problem... I'm trying to format a number
with padding zeros but I can't figure out how to do it in this
particular situation.
I know I can use a formatted string with something like
[stringWithFormat:@"%03d", 5], which would result in 005 but the
problem in this particular case is that the number of padding zeros
(3 in my example) is a variable defined by the user... (let's say it
resides in an int variable named "int paddingZeros"....)
Is there an easy way I can pad a number with a variable amount of
zeros?
Yes:
[stringWithFormat:@"%0*d", paddingZeros, 5]
At least, I think that's how you'd do it. I can't say I've ever done
this while padding with zeros, just for specifying a width. The man
page for printf seems to agree with me, though:
"A field width or precision may be '*' instead of a digit string. In
this case an argument supplies the field width or precision."
Although it doesn't show that specific example.
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