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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:# h: k+ W' h7 n; w6 g
有無人知點解?
# h+ C% ~/ @0 Q$ ^. FServer 的Backup Code?& G0 f9 _/ X* x8 A5 _
so funny, thanks a lot! 5 @+ q u X0 A' W) b+ Z
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好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面4 F9 [) [0 E8 c3 x, R8 c
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff)
% S, m/ y% D1 ~" v' v; i+ ^/ k7 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)
) m, E3 r; V9 \/ q* r. Ie.g.
/ ~& w' `8 r+ {6 \% }: W/ B0 + 4294967295 = 4294967295 (max)/ A3 [* g/ `" ?$ G
1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)8 g/ D1 V! ]; Q5 j, ?
and so on....$ _" ]9 u, i* Y% T8 s" t0 A
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[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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