round off problem

[kamilhus]

Hello, I was trying to calculate something. The main concept is that there is a number say a=50.5555333
and another number b=20.00
When I subtract b from a, I get lower than 30
Can anyone help me so that the computer takes all the numbers as significan. I mean I want to get 20.5555333
Thanks in advance
Kamil

 

[Ygor]

Perhaps a problem with the output format, otherwise I don't see any problems...

awk -v a=50.5555333 -v b=20.00 -v OFMT=%.7f 'BEGIN{print a - b}'

...gives...

30.5555333