ABAP中加上前导零、去除前导零

*加上前导零

  CALL FUNCTION 'CONVERSION_EXIT_ALPHA_INPUT'
    EXPORTING
      input  = L_IN
    IMPORTING
      output = L_OUT.

*去除前导零

  CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
    EXPORTING
      input  = L_IN
    IMPORTING
     output = L_OUT.