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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:
- Y0 a0 ?1 Y% }; B7 y有無人知點解?
, _* m4 M1 z$ G3 J! e8 ^Server 的Backup Code?( {; J% j7 V1 h
so funny, thanks a lot! w. V( V1 ]; m U% @) `
` L1 t' {& [7 a% g
好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面
, J9 g- @; b, {9 C! n0 FMaximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) . g, s9 m# k; a. _8 a( d4 m+ ?
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 Z7 {* F3 P# ce.g.
+ f) T; D0 k. W3 W! h- S0 + 4294967295 = 4294967295 (max)* C$ H8 r# O% J& P& n1 e
1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow); P0 G# D! G: X, S9 K, x
and so on....5 Y8 j6 X) U9 @
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[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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