Problem with float precision... help!!

[artcalv]

I'm running GAWK on WIN32 and I have a terrible problem with float precision.

I read from a file float numbers with 9 decimals, and I've checked it is ok. The problem is when I try to operate with them, because they become just 6 decimals precision.

What can I do?? I've tried with printf("%.8f",res) but it prints all the time "0.80.80.80.80.8...".

Here is my code. Thanks a lot!!

gawk "{post=$1}{print post-prev}{prev=$1}" myInput

 

[feherke]

Hi

To avoid misunderstandings, you use the [tt]gawk[/tt] from CygWin's terminal, so from [tt]bash[/tt] running in a Command Prompt window. It seems to work for me.

[blue]master #[/blue] cat pi.txt
3.14159265358979323846264338327950288419716939937510

[blue]master #[/blue] awk '{printf("%.8f\n",$1)}' pi.txt
3.14159265

[blue]master #[/blue] awk '{printf("%.8f\n",$1*2)}' pi.txt
6.28318531

Show us more from your code and how actually run it.

Feherke.

http://rootshell.be/~feherke/