Currency reference for currency fields

Hi All,

I have a issue with reference currency,

1. i have currency amount field in view and next to that there is a currency field, how to refer currency to amount field in order to control decimals format based on currency.  ex. if crcy USD output should be with 2 decimals, if crcy jpy output should be with no decimals.

2. similarly i have same fields in alv output(webdyn pro), in this case how to refer to crcy?

Thanks,