（1）shift
SHIT ITAB-FIELD LEFT DELETING LEADING
‘0’。
(2)function
--------------------------------------------------------------
去掉前面0
*&--------------------------------------------------------------------*
*&
Form frm_alpha_output
去零
*&--------------------------------------------------------------------*
call
function ‘CONVERSION_EXIT_ALPHA_OUTPUT‘
exporting
input =
& 1
importing
output =
& 1.
---------------------------------------------------
前面加0
---------------------------------------------------
call
function ‘CONVERSION_EXIT_ALPHA_INPUT‘
exporting
input =
& 1
importing
output = &1.
去前导零,布布扣,bubuko.com
去前导零
原文：http://www.cnblogs.com/rainysblog/p/3666296.html
