Re: Using (s)printf()

Your statement and example under "Rounding Numbers with sprintf()" is incorrect and misleading. Using "%d" does NOT round a float as necessary, it merely truncates everything after the decimal. Thus, printf("%d", 3.99); # will print 3, not 4.

# To properly 'round a float as necessary':
printf("%.0f", 3.49); # This will print 3
printf("%.0f", 3.51); # This will print 4
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Re^2: Using (s)printf() by Anonymous Monk on Oct 01, 2012 at 11:04 UTC
Perl exhibits strange behaviour after moving from x32 to x64 platform: Before: `# perl -e 'printf("%.2f", 6.685);' 6.68` [download] `# perl -v This is perl, v5.10.1 () built for i386-linux-thread-multi` [download] After: `# perl -e 'printf("%.2f", 6.685);' 6.69` [download] `# perl -v This is perl, v5.10.1 () built for x86_64-linux-thread-multi` [download] Any changes in rounding algorithm?	[reply] [d/l] [select]
Re^3: Using (s)printf() by Anonymous Monk on Oct 01, 2012 at 11:11 UTC
Any changes in rounding algorithm? Nope, see Is this odd behavior a floating point problem?	[reply]
Re^4: Using (s)printf() by Anonymous Monk on Oct 03, 2012 at 06:14 UTC
It looks like there is a problem with numeric.c: Perl_grok_number (Perl's own string-to-number conversion). Perl bugs tickets #115092, #41202	[reply]