topic Re: Decimal Floating Point in Application Development and Automation Discussions

Decimal Floating Point

Former Member — Fri, 07 Nov 2014 12:46:06 GMT

The value of <LFS_DECFLOAT> is correct whereas <LFS1_DECFLOAT> looks to be incorrect. Can anyone explain why the value of <LFS_DECFLOAT> GT 1?

Many Thanks, Tanmoy

Re: Decimal Floating Point

former_member538259 — Fri, 07 Nov 2014 13:00:29 GMT

May be u use the same memory space. Try this

DATA: lv_dec16 TYPE DECFLOAT16,
       lv_dec34 TYPE decfloat34,
       lv_dec34_2 TYPE decfloat34.

FIELD-SYMBOLS: <lf_dec> TYPE decfloat,
                <lf_dec1> TYPE decfloat.

   lv_dec34 = 1 / 9.
   lv_dec34_2 = 1 / 9.
   ASSIGN lv_dec34 TO <lf_dec>.
   ASSIGN lv_dec34_2 TO <lf_dec1> CASTING TYPE decfloat34."changed to 34
   IF sy-subrc IS INITIAL.

   ENDIF.

Regards,

Alberto Montes

Re: Decimal Floating Point

Former Member — Fri, 07 Nov 2014 14:19:44 GMT

I don't understand why does the value get changed? It should still be 0.111111111111111 at most.

Thanks, Tanmoy

Re: Decimal Floating Point

former_member538259 — Tue, 11 Nov 2014 09:10:02 GMT

DATA: lv_dec16 TYPE DECFLOAT16,
       lv_dec34 TYPE decfloat34,
       lv_dec34_2 TYPE decfloat34.

FIELD-SYMBOLS: <lf_dec> TYPE decfloat,
                <lf_dec2> TYPE decfloat.

   lv_dec34 = 1 / 9.
   lv_dec16 = 1 / 9.
   ASSIGN lv_dec34 TO <lf_dec>.
   ASSIGN lv_dec16 TO <lf_dec2>.
   IF sy-subrc IS INITIAL.

   ENDIF.

I think you cant do that, because decfloat do the conversion automaticly. So if you have a decfloat16 variable, the assign to decfloat do the conversion decfloat16->decfloat. And the same with decfloat34. I supose you force the conversion of decfloat to decfloat16, first the assign to decfloat from decfloat34 and then the forced conversion to decfloat16. The data changes because you are watching the number of a decfloat like a decfloat16.