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rmvfront(Str)
{
  Str1 := Substr(Str, 1, 1)
  If Str1 is not integer
    Str := Substr(Str, 2)
  Return Str
}
rmvback(Str)
{
  Str1 := Substr(Str, 0, 1)
  If Str1 is not integer
    Str := Substr(Str, 1, Strlen(Str)-1)
  Return Str
}
Rmvstr(Str) ;移除头尾非数字字符
{
Loop {
  A1:=Substr(Str, 1, 1)
  If A1 is not integer
    {Str:=rmvfront(Str)
    continue ;下个循环 
  }
  If Substr(Str, 1, 1) is integer
    break ;跳出loop
}
;msgbox % Str
Loop {
  A1:=Substr(Str, 0, 1)
  If A1 is not integer
    {Str:=rmvback(Str)
    continue ;下个循环 
  }
  If Substr(Str, 0, 1) is integer
    break ;跳出loop
}
;msgbox % Str
}

!w::
A:="25+3"
msgbox %  A
A:=Rmvstr(A)
msgbox % A