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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:
5 o: j! B$ C2 _有無人知點解?
& m$ j8 H( x- j4 P x" Q' W8 WServer 的Backup Code?
) B7 k( y' ^1 pso funny, thanks a lot! 9 H7 W- _7 h$ L
" G. B. J$ \9 j# g1 N好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面
, i+ H U% ], `8 R! uMaximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff)
* z" W% B# y! {9 P( P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)
7 {$ }7 }8 @: h5 [e.g.; Y' a# w* E$ ^) X9 A* N0 I
0 + 4294967295 = 4294967295 (max)
9 X0 z# ]2 ]6 p1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)1 t9 U, @8 y- u
and so on....+ \3 r5 D" b7 D" p: }
+ C9 o: m2 l2 r
[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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