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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:( _" V" L4 p" o
有無人知點解?
& S/ W3 {6 c- W% F" m1 N7 O, IServer 的Backup Code?; I7 l5 ~$ P5 G
so funny, thanks a lot! . w% i& t( B( f
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好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面
( ?' {1 @; |; t' WMaximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff)
: V' y' {, ]' u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)
- @+ d8 ]) B4 ~. [e.g.
+ U: I# d: h8 B1 ?1 J. h% S0 + 4294967295 = 4294967295 (max)
9 u9 P9 ~; Y! m/ i) e. [& H0 J1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)/ ^6 P( P) M+ }# p2 d# d8 _
and so on....
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[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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