Print a float in C with two decimals but no trailing zeroes

Question

Is there a simple, quick way in C to convert or print a float so that the output has a precision of two decimals (not more), but in case there are any trailing zeroes they get cut out?

Examples:

100.456 -> 100.46
100.32 -> 100.32
100.7046 -> 100.7
100.00 -> 100

Let's say we have float x; and we execute printf(%.2f, x). This would satisfy the first requirement, since any float would be printed with a maximum precision of 2 decimals. The problem though is that for x=100.00 or 100.7046 we would get respectively 100.00 and 100.70.

Using "g" as a format wouldn't fix the problem either. Any ideas?

@EricPostpischil thanks, but the link that you suggest proposes using "g" as a format, which wouldn't actually solve my problem... — Pensierinmusica, Mar 05 '13 at 15:49
@Pensierinmusica: nevertheless, you have asked the same question as that other one. Since the first paragraph of the first answer isn't suitable, keep reading. — Steve Jessop, Mar 05 '13 at 15:50
@SteveJessop reading carefully it's actually not the same question. The link that you're referring to accepts any number of relevant decimals, whereas in my example we're limiting it to 2. — Pensierinmusica, Mar 05 '13 at 15:55
@Pensierinmusica: The answer is the same: Print to a buffer, then edit. — Eric Postpischil, Mar 05 '13 at 15:57
@EricPostpischil isn't there really any easier way? Anything more practical or that could be achieved with just a few characters of code? Seems a bit crazy for such a simple task. — Pensierinmusica, Mar 05 '13 at 16:05
Sometimes, when doing computer programming, you have to program the computer. — Eric Postpischil, Mar 05 '13 at 16:27
Hi @EricBainville, thanks for pointing that out! I just corrected the example :) — Pensierinmusica, Mar 06 '13 at 00:06

brbcoding · Answer 1 · 2013-03-05T15:46:23.290

-2

printf ("%.2f", 100.456); should give you 100.46

edited Mar 05 '13 at 15:46

answered Mar 05 '13 at 15:39

brbcoding

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What about `100.7056 -> 100.7` and `100.00 -> 100`. – Mar 05 '13 at 15:41
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I thought you were looking to preserve trailing zeroes, not remove them... [This](http://stackoverflow.com/questions/1343890/rounding-number-to-2-decimal-places-in-c) is almost the exact same question and has several answers that might help you... – brbcoding Mar 05 '13 at 15:44
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Thanks, but it doesn't answer the question. – Pensierinmusica Mar 05 '13 at 15:52

Print a float in C with two decimals but no trailing zeroes

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