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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:1 J7 q1 g c2 ?; z
有無人知點解?
3 J2 h7 |. A g8 k* d$ oServer 的Backup Code?
5 g4 O$ w: b9 K! {1 }+ d, s, a) sso funny, thanks a lot! 2 Q+ J$ D/ Y. w! K+ t
# ]% d& `) c4 a7 Y. I% I好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面- z1 J2 A. R. H* a
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) ' _ M$ h7 o) |. x, F! e
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)
" |; [, @0 V. ^ y3 [4 Ie.g.
' E8 m7 d' T' m; S! p0 + 4294967295 = 4294967295 (max)
( T1 I+ @$ C" m. Y9 T1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)
?1 o6 h5 c, `+ @( v% `and so on....
# ~ C3 d: h( `- t9 x& m- r0 K' e- @4 N* u
[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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