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$ perl -e'printf qq[%s => %.68f => %.1f\n], (qq[0.${_}5]) x 3 for (0.. +9)' 0.05 => 0.050000000000000000000677626357803440271254658000543713569641 +11328125 => 0.1 0.15 => 0.150000000000000000005421010862427522170037264004349708557128 +90625000 => 0.2 0.25 => 0.250000000000000000000000000000000000000000000000000000000000 +00000000 => 0.2 0.35 => 0.349999999999999999994578989137572477829962735995650291442871 +09375000 => 0.3 0.45 => 0.449999999999999999989157978275144955659925471991300582885742 +18750000 => 0.4 0.55 => 0.550000000000000000010842021724855044340074528008699417114257 +81250000 => 0.6 0.65 => 0.649999999999999999978315956550289911319850943982601165771484 +37500000 => 0.6 0.75 => 0.750000000000000000000000000000000000000000000000000000000000 +00000000 => 0.8 0.85 => 0.850000000000000000021684043449710088680149056017398834228515 +62500000 => 0.9 0.95 => 0.949999999999999999989157978275144955659925471991300582885742 +18750000 => 0.9

$ perl -V
Summary of my perl5 (revision 5 version 16 subversion 0) configuration +: Platform: osname=linux, osvers=3.1.10-1.9-desktop, archname=x86_64-linux-thr +ead-multi-ld uname='linux champion 3.1.10-1.9-desktop #1 smp preempt thu apr 5 +18:48:38 utc 2012 (4a97ec8) x86_64 x86_64 x86_64 gnulinux ' config_args='-de -Dprefix=/home/daxim/local/share/perlbrew/perls/p +erl-5.16.0 -DDEBUGGING -Dusemorebits -Dusethreads -Dcf_email=daxim@cp -Accflags=-fPIC' hint=recommended, useposix=true, d_sigaction=define useithreads=define, usemultiplicity=define useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=und +ef use64bitint=define, use64bitall=define, uselongdouble=define usemymalloc=n, bincompat5005=undef Compiler: cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fPIC -DDEBUGGING -f +no-strict-aliasing -pipe -fstack-protector -I/usr/local/include -D_LA +RGEFILE_SOURCE -D_FILE_OFFSET_BITS=64', optimize='-O2 -g', cppflags='-D_REENTRANT -D_GNU_SOURCE -fPIC -DDEBUGGING -fno-strict +-aliasing -pipe -fstack-protector -I/usr/local/include' ccversion='', gccversion='4.6.2', gccosandvers='' intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678 d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=1 +6 ivtype='long', ivsize=8, nvtype='long double', nvsize=16, Off_t='o +ff_t', lseeksize=8 alignbytes=16, prototype=define Linker and Libraries: ld='cc', ldflags =' -fstack-protector -L/usr/local/lib' libpth=/usr/local/lib /lib/../lib64 /usr/lib/../lib64 /lib /usr/li +b /lib64 /usr/lib64 /usr/local/lib64 libs=-lnsl -lndbm -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread -l +c -lgdbm_compat perllibs=-lnsl -ldl -lm -lcrypt -lutil -lpthread -lc libc=/lib/, so=so, useshrplib=false, libperl=libperl.a gnulibc_version='2.15' Dynamic Linking: dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E' cccdlflags='-fPIC', lddlflags='-shared -O2 -g -L/usr/local/lib -fs +tack-protector' Characteristics of this binary (from libperl): Compile-time options: DEBUGGING HAS_TIMES MULTIPLICITY PERLIO_LAYERS PERL_DONT_CREATE_GVSV PERL_IMPLICIT_CONTEXT PERL_MALLOC_WRAP PERL_PRESERVE_IVUV PERL_TRACK_MEMPOOL USE_64_BIT_ALL USE_64_BIT_I +NT USE_ITHREADS USE_LARGE_FILES USE_LOCALE USE_LOCALE_COLLATE USE_LOCALE_CTYPE USE_LOCALE_NUMERIC USE_LONG_DOUBLE USE_PERLIO USE_PERL_ATOF USE_REENTRANT_API Built under linux Compiled at May 22 2012 09:25:33 %ENV: PERLBREW_BASHRC_VERSION="0.42" PERLBREW_HOME="/home/daxim/.perlbrew" PERLBREW_MANPATH="/home/daxim/local/share/perlbrew/perls/perl-5.16 +.0/man" PERLBREW_PATH="/home/daxim/local/share/perlbrew/bin:/home/daxim/lo +cal/share/perlbrew/perls/perl-5.16.0/bin" PERLBREW_PERL="perl-5.16.0" PERLBREW_ROOT="/home/daxim/local/share/perlbrew" PERLBREW_VERSION="0.42" @INC: /home/daxim/local/share/perlbrew/perls/perl-5.16.0/lib/site_perl/5 +.16.0/x86_64-linux-thread-multi-ld /home/daxim/local/share/perlbrew/perls/perl-5.16.0/lib/site_perl/5 +.16.0 /home/daxim/local/share/perlbrew/perls/perl-5.16.0/lib/5.16.0/x86_ +64-linux-thread-multi-ld /home/daxim/local/share/perlbrew/perls/perl-5.16.0/lib/5.16.0 .

In reply to Re^3: Fucking sprintf rounding - how does it work? by daxim
in thread F***ing sprintf rounding - how does it work? by ribasushi

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