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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:
, j" x" D3 b6 q/ i有無人知點解?
- H- J) c: o3 Q2 i3 `Server 的Backup Code?
; P& x: z$ u; N8 l, R3 Dso funny, thanks a lot! . \3 o& ]7 d0 d: O0 h
+ K* u2 _# }- w# C# u( N好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面
& `' R# a9 [4 m3 d }Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) 5 \! C' W& X- H w- X' F0 n
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 |- f6 J$ t) W( x
e.g.
6 }) E: D. P: ~9 n! n8 y9 p0 + 4294967295 = 4294967295 (max) f% D" ?. p0 v' ]1 i. ^* y! v$ B
1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)
4 s1 V0 o* Y8 ?- ]8 O* N: E/ w2 p3 v3 Cand so on....
+ T, V3 X) z1 q K( p2 E2 { m& @9 h; _+ }
[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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