• 间接法
  1.根据输入日期连接为所需要格式

  SHIFT l_rpmax LEFT DELETING LEADING ''.
  SHIFT l_rpmax LEFT DELETING LEADING '0'.
  IF l_rpmax+1(1) = ''.
    CONCATENATE '0' l_rpmax INTO l_rpmax.
  ENDIF.
  CONCATENATE 'W_FAGL-HSL' l_rpmax INTO p_fhsl.```

2.按科目取数、SELECT累加单次金额
```  DATA lt_fhsl(12) TYPE c.
  LOOP AT it_zfir002 WHERE rownb = p_rownb
 AND raccf NE ''.
    CLEAR: l_curr, l_hslvt.
  select
    saknr
  into table gt_saknr
  from skb1
  where ALTKT BETWEEN  it_zfir002-raccf and it_zfir002-racct.```


  ``` loop at gt_saknr into gs_saknr.
 SELECT SUM( hslvt ) SUM( hsl01 ) SUM( hsl02 ) SUM( hsl03 )
 SUM( hsl04 ) SUM( hsl05 ) SUM( hsl06 ) SUM( hsl07 )
 SUM( hsl08 ) SUM( hsl09 ) SUM( hsl10 ) SUM( hsl11 )
SUM( hsl12 )
"INTO CORRESPONDING FIELDS OF w_fagl
INTO (w_fagl-hslvt,w_fagl-hsl01,w_fagl-hsl02,w_fagl-hsl03,
 w_fagl-hsl04,w_fagl-hsl05,w_fagl-hsl06,w_fagl-hsl07,w_fagl-hsl08,
w_fagl-hsl09,w_fagl-hsl10,w_fagl-hsl11,w_fagl-hsl12)
FROM faglflext
WHERE rbukrs = it_zfir002-bukrs
AND ryear = p_ryear
 AND racct  =  gs_saknr-saknr
 AND rfarea = it_zfir002-rfarea
AND rldnr IN s_rldnr.```

3.将期间金额累加
*&-----------每循环一次lt_fhsl+1，累加
``` lt_fhsl = l_fhsl.
    WHILE lt_fhsl LE l_lhsl.
      WRITE (lt_fhsl) TO l_hslvt.
      lt_fhsl+10(2) = lt_fhsl+10(2) + 1.
      IF lt_fhsl+11(1) = ''.
        lt_fhsl+11(1) = lt_fhsl+10(1).
        lt_fhsl+10(1) = '0'.
      ENDIF.```

   ```   PERFORM frm_char_to_number USING l_hslvt
                        CHANGING l_curr.
      IF it_zfir002-symbl <> 'X'.
        "( it_zfir002-accty = '+' AND it_zfir002-symbl = '' ) OR
         "( it_zfir002-accty = '-' AND it_zfir002-symbl = 'X' ).
        IF p_rownb+2(1) = 'A'.
          p_qimo = p_qimo + l_curr.
        ELSE.
          p_qimo = p_qimo - l_curr.
        ENDIF.
      ELSE.
        IF p_rownb+2(1) = 'A'.
          p_qimo = p_qimo + l_curr.
        ELSE.
          p_qimo = p_qimo - l_curr.
        ENDIF.
      ENDIF.
    ENDWHILE.```

* 直接法
``` DATA:l_vary  LIKE faglflext-hsl01, "FAGLFLEXT表字段变量
l_rpmax LIKE faglflext-rpmax. "最大执行次数
    l_rpmax = p_monat - 1. "输入的日期-1
    g_sum01 = 0.
    g_sum02 = 0.```


   ``` LOOP AT t_faglflext INTO w_faglflext.
      g_sum01 = g_sum01 + w_faglflext-hslvt.
      g_sum02 = g_sum02 + w_faglflext-hslvt.
      DO l_rpmax TIMES VARYING l_vary FROM w_faglflext-hsl01 NEXT w_faglflext-hsl02. "将总帐的第一个期间到当前期间累加到l_vary 变量表.
        g_sum01 = g_sum01 + l_vary.
      ENDDO.
    ENDLOOP.```
######多用变量会省下很多时间