Re: Formatting float numbers
Re: Formatting float numbers
- Subject: Re: Formatting float numbers
- From: Adriano Brandão <email@hidden>
- Date: Sun, 22 Aug 2010 20:35:03 -0300
Thanks man, I tested here and it's working now.
But, just for curiosity, if I was using only c++ wouldn't I be able to do that?
On 22/08/2010, at 19:04, Greg Parker wrote:
> On Aug 21, 2010, at 9:59 AM, Adriano Brandão wrote:
>> I'm having some troubles in formatting float numbers. If I wish to display 25.342 using only 2 decimal places I could use %.2f and it would do the job. But if the number to be formatted is flat (like 25.000) I get 25.00 as a result.
>> After a little bit of research I found out that I could use # as a flag (%.#2f). But, even in this case, I get 25. (with the dot). So, what's the right way for displaying only 25 (mantaining the 2 decimal places for numbers that use them)?
>
> You can't get that result directly from printf(3), but you can do it with NSNumberFormatter:
>
> {
> NSNumberFormatter *fmt = [[NSNumberFormatter alloc] init];
> [fmt setFormat:@"0.##"];
> NSLog(@"%@", [fmt stringFromNumber:[NSNumber numberWithFloat:25.342]]);
> NSLog(@"%@", [fmt stringFromNumber:[NSNumber numberWithFloat:25.3]]);
> NSLog(@"%@", [fmt stringFromNumber:[NSNumber numberWithFloat:25.0]]);
> }
>
> 2010-08-22 15:04:10.614 a.out[6954:903] 25.34
> 2010-08-22 15:04:10.616 a.out[6954:903] 25.3
> 2010-08-22 15:04:10.617 a.out[6954:903] 25
>
>
> --
> Greg Parker email@hidden Runtime Wrangler
>
>
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