topic Re: SET BIT in Application Development and Automation Discussions

SET BIT

Former Member — Tue, 04 Dec 2007 13:30:00 GMT

Good Evening to all,

can anybody explains me how SET BIT bitpos OF byte_string [TO val] get works.

I concluded that it will set the bit of position (bitpos) of string (byte_string).

buti am nt getting how it works ?

can anybody briefly explains me how this get works and how this program works?

DATA hex TYPE x LENGTH 1.

DO 8 TIMES.

CLEAR hex.

SET BIT sy-index OF hex. "how it works

WRITE hex.

ENDDO.

output is: 80 40 20 10 08 04 02 01

Re: SET BIT

matt — Tue, 04 Dec 2007 13:40:35 GMT

Through each loop iteration, the variable hex is cleared, so contains binary value 00000000.

First time through the loop. sy-index is 1, and so bit 1 is set, so you have binary value 00000001. Which is hex 01.

Next time through the loop, sy-index is 2, and so bit 2 is set, so you have binary value 00000010. Which is hex 02.

Next time through the loop, sy-index is 3, and so bit 3 is set, so you have binary value 00000100. Which is hex 04.

and so on.

matt

Re: SET BIT

Former Member — Wed, 05 Dec 2007 04:44:37 GMT

Thank you very much Matthew .

can you give me some example where i can still analyze the operation of "set bit"

Message was edited by:

priya latha

Re: SET BIT

matt — Wed, 05 Dec 2007 08:33:54 GMT

Do you understand binary representation? And how to convert between hex, decimal and binary? If not, read <a href="http://en.wikipedia.org/wiki/Binary_numeral_system">this</a>. Above what I've already explained, there's not really much else to say. And you shouldn't worry about it too much. BITwise operations are very rarely used in ABAP.

matt