调用函数
加前导零：CALL FUNCTION ‘CONVERSION_EXIT_ALPHA_INPUT‘
去前导零：CALL FUNCTION ‘CONVERSION_EXIT_ALPHA_OUTPUT‘
加前导零
1 CALL FUNCTION ‘CONVERSION_EXIT_ALPHA_INPUT‘ 2 EXPORTING 3 input = MATNR 传入参数 4 IMPORTING 5 output = MATNR.
去前导零
1 CALL FUNCTION ‘CONVERSION_EXIT_ALPHA_OUTPUT‘ 2 EXPORTING 3 input = MATNR 4 IMPORTING 5 output = MATNR.
原文：https://www.cnblogs.com/liuyutan/p/15088674.html