Help me to build the logic

Question

Hi experts,
i want to build the logic as follows.
the give fields in the ITAB are.
F1    F2 F3
123  546
222  788
222  277
222  666
345  431
345  888
777  888
F1 AND F2 are the given fields i want to out put f3 as follow.
F1    F2  F3
123  546  10
222  788  10
222  277  20 
222  666  30
345  431  10
345  888  20
345  888  20
if f1 abd f2 repeats the f3 will be same number.
if f1 repeats and f2 is diff then sequence will be incremented every time by 10.
when f1 starts with diff number then f3 starts with number 10 as above shown.
Please build me the logic by using Internal table.
Please help me

Answer 1

Hi Ramesh,
Please see the following test program..
<b>REPORT ZSRITEST44 .
DATA: BEGIN OF gt_data OCCURS 0,
        f1 TYPE i,
        f2 TYPE i,
        f3 TYPE i,
      END OF gt_data,
      BEGIN OF gt_datac OCCURS 0,
        f1(10),
        f2(10),
        f3 TYPE i,
      END OF gt_datac,
      gv_counter TYPE i.
gt_data-f1 = 123.
gt_data-f2 = 546.
APPEND gt_data.
gt_data-f1 = 222.
gt_data-f2 = 546.
APPEND gt_data.
gt_data-f1 = 222.
gt_data-f2 = 277.
APPEND gt_data.
gt_data-f1 = 222.
gt_data-f2 = 666.
APPEND gt_data.
gt_data-f1 = 345.
gt_data-f2 = 431.
APPEND gt_data.
gt_data-f1 = 345.
gt_data-f2 = 888.
APPEND gt_data.
gt_data-f1 = 345.
gt_data-f2 = 888.
APPEND gt_data.
gt_data-f1 = 777.
gt_data-f2 = 888.
APPEND gt_data.
SORT gt_data BY f1 f2.
LOOP AT gt_data.
  AT NEW f2.
    ADD 10 TO gv_counter.
  ENDAT.
  AT NEW f1.
    CLEAR gv_counter.
  ENDAT.
  IF gt_datac-f1 EQ gt_data-f1
  AND gt_datac-f2 EQ gt_data-f2.
    IF gv_counter GT 0.
      gv_counter = -1 * gv_counter.
    ENDIF.
  ENDIF.
  gt_datac-f1 = gt_data-f1.
  gt_datac-f2 = gt_data-f2.
  gt_datac-f3 = gv_counter + 10.
  COLLECT gt_datac.
  IF gv_counter LT 0.
    CLEAR gv_counter.
  ENDIF.
ENDLOOP.
LOOP AT gt_datac.
  gt_data-f3 = gt_datac-f3.
  MODIFY gt_data TRANSPORTING f3
  WHERE f1 = gt_datac-f1 AND f2 = gt_datac-f2.
ENDLOOP.
LOOP AT gt_data.
  WRITE: / gt_data-f1, sy-vline, gt_data-f2, sy-vline, gt_data-f3.
ENDLOOP.</b>
Hope this helps..
Sri