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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:8 U* ?* f4 d1 Z% \; U
有無人知點解?
: m& n% {( Y3 [# @Server 的Backup Code?
. s$ c! n& z5 bso funny, thanks a lot! ) r0 G L' b# f2 q! b: @
5 A2 B R t. y' j$ p5 ~好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面3 X, l+ E- V' A# L U
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) % y( @& b) j* u+ R0 |
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)
: L5 |7 x$ H+ Oe.g.; m0 K+ ^8 _) B8 Y* P5 U# p- s2 c" y
0 + 4294967295 = 4294967295 (max)
: ~4 ^: z- |4 h, q) D, ^1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)/ R! i6 u9 M6 @. a+ h$ ?
and so on....
' v: T4 B+ q. M* M1 p; W: w( _! [. y5 [' v7 c
[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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