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3#
發表於 2005-6-19 06:50 PM
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Originally posted by secretfj at 2005-6-19 06:37 PM:) l t# h& h! E
有無人知點解?
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so funny, thanks a lot! 6 z3 E+ A2 P! c% m
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好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面
$ X, d5 {$ ^1 O \, K& ~Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) % C* ~" K3 Q0 n* h& z
個 value 過左呢個 range 就會 overflow , 佢只會理最後個32bits 數 (即係好似返返轉頭 , 循環咁)
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0 + 4294967295 = 4294967295 (max)) P$ z9 M$ h" B- ~
1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)
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[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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