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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:
' W* H! a) a* Y2 @+ V/ @. Z有無人知點解?7 ]( E! G/ u& I6 W4 A
Server 的Backup Code?
0 F8 e$ w% P& U; i% n3 Vso funny, thanks a lot! * Z( e. R" k2 t, G; @5 G# j
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好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面% B0 x$ D. A: B
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) 8 V8 [. q2 y9 B2 X) G8 M4 `7 Y
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)
( ?. M3 S6 y- n G' O1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)
+ U" O& T) ~7 e0 r, F6 Nand so on....8 \6 G' }; V1 D& w4 ~) y+ ~
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[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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