删除固定位置字符串
DATA: str1 TYPE string.
DATA: str2 TYPE string.
DATA: str3 TYPE string.
str1 = 'teststring123'.
"delete 'string’
str2 = str1+0(4).
str3 = str1+10(3).
CONCATENATE str2 str3 INTO str1.
write str1.

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