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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:9 e1 }6 ~. G6 V4 N$ B* D: u& ?
有無人知點解?
$ q i9 r, Y% B6 Y, h: Q& m. AServer 的Backup Code?
+ v. S. j" R: Zso funny, thanks a lot! % @+ e+ g P2 B2 N' j4 l. y, F- j
' v3 {1 V4 V# r好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面
' K+ P+ j- i* B/ yMaximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) 0 @1 v, e% O1 ]) A
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)4 z9 J* ]" X% `1 |$ ?
e.g.' u/ I7 I9 t0 a
0 + 4294967295 = 4294967295 (max)
+ _, O$ O+ }+ F% t8 H1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)
! H5 R. n/ [( [and so on....
) Y4 t5 H0 ?' |' L1 X# I! G: ^& }# E
[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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