天 天真 Unregistered / Unconfirmed GUEST, unregistred user! 2002-10-11 #3 if pos('aa','baaa')>0 then SHOWMESSAGE(‘存在’);p
D duckstar Unregistered / Unconfirmed GUEST, unregistred user! 2002-10-11 #4 pos(substr, str) <> 0 则存在。