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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:
n& ^/ H' o- A; G& ?4 l$ Z有無人知點解?
, O# X$ ?: e$ q' E" a# B9 A% I7 K7 cServer 的Backup Code?, b5 k4 D% B' y4 Z
so funny, thanks a lot! 6 Q5 t9 x* d% g( R4 S, s
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好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面5 J+ ~% R$ `/ V4 I) u
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff)
, I- v+ W b: B2 _0 z! ?+ C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)
. U8 l' `) E; E+ W% ~# C$ he.g.
) A, N( W1 X# z+ G0 + 4294967295 = 4294967295 (max)8 y B# Y1 V. `6 y" V4 y* Y
1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)* u. @. u4 h! G' w3 E
and so on....! E5 R+ H+ q$ x, y
C* T2 B- \# }, W' J[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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