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+ Official Forum for Programming in Objective-C (the iPhone Programming Language) - Stephen Kochan
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Phillip Anthony
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on: April 28, 2010, 08:00:41 AM

Going over my 1st Edition examples that I have previously coded in, I noticed in Example 6.2 that you used the printf() function.  In the 2nd Edition you switched over to NSLog().

My questions are:
1.  Should we NOT be using printf()?

2.  If not, is there a way to insert a carriage return in NSLog()?  Using "\n" does not work in NSLog().

I think this is all going to be academic in that my concern only matters to Console output, while using a GUI will not concern itself with carriage returns and this is our ultimate goal. 

Did I answer my own question?

Thanks,
Phillip Anthony
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skochan
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Reply #1 on: April 28, 2010, 10:18:30 AM

Yes, you answered your own questions.   I decided to introduce NSLog earlier in the second edition to avoid the use of the C-style character string that printf uses as its first argument.

Cheers,

Steve Kochan
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Phillip Anthony
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Reply #2 on: April 28, 2010, 05:46:55 PM

Thanks, Steve.

For what it's worth, I have learned quite a bit in just comparing the changes you brought about in the 2nd edition against the same examples in the 1st edition.

Regards,
Phillip
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C-ing.Objectively
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Reply #3 on: May 26, 2010, 11:48:41 AM

Quote
Using "\n" does not work in NSLog().

Code: (Objective-C)
NSLog(@"line one\nline two");

Works just the same, doesn't it?  Huh
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Marcolavida
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Reply #4 on: November 05, 2011, 02:29:16 PM

Hi all,

I just come across something that I think it is worth to share and worth to understand as well, take a look at the code snippet and try to explain why is it showing 0.000 instead of 5.89

code :

float float32 = 5.89;
long long int int64 = 1;

printf "int64 = dn", int64;
printf "float32 = f n", float32;
printf "int64 = d nfloat32 = f n", int64, float32;


results:
int64 = 1
float32 = 5.890000
int64 = 1
float32 = 0.000000

regards,
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skochan
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Reply #5 on: November 05, 2011, 05:18:06 PM

It looks like all your parens and %'s were stripped from the post (as well as \ chars).  Can you try again?

Cheers,

Steve
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