Exponential to Decimal 1

[gixmono]

Hi Gurus

Mi Name is Raul and I've this little problem with awk.

I'm trying change the data format within an ascii file
from this (floating,exponential or scientific):

#
#
#
0.57210E+06 0.21808E+07 0.10000E+31
0.57210E+06 0.21807E+07 0.10000E+31
0.57210E+06 0.21780E+07 -3736.9
0.57210E+06 0.21779E+07 -3750.0
0.57210E+06 0.21778E+07 -3763.6
0.57210E+06 0.21777E+07 -3779.9
.
.
.

to decimal, using this:

#!/bin/awk -f
NR<3 {
print
}
NR>=3 {
printf "%12.2f %12.2f %12.2f\n", $1, $2, $3
}

But this is what I get:

#
#
#
572100.00 2180800.00 1000000000000000019884624838656.00
572100.00 2180700.00 1000000000000000019884624838656.00
572100.00 2178000.00 -3736.90
572100.00 2177900.00 -3750.00
572100.00 2177800.00 -3763.60
572100.00 2177700.00 -3779.90

It should be:
1000000000000000000000000000000.00

Not:
1000000000000000019884624838656.00

Does anyone knows why ??

 

[feherke]

Hi

The value is not stored with so big precision. Floating point values usually have up to 19 digit precision. For example you get the same in Perl too :

[blue]master #[/blue] perl -e 'printf "%12.2f",0.10000E+31'
1000000000000000019884624838656.00

The solution could be to use other language, which has such support :

[blue]master #[/blue] perl -Mbignum -e 'print 0.10000E+31'
10000000000000000000000000000000

Sorry for the offtopic solution.

Feherke.

http://rootshell.be/~feherke/

 

[gixmono]

Thank You very much for your help.

I can use perl to do the job.