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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: _- `) R3 a& P3 }# v d! d! o7 i
有無人知點解?4 i4 t P) i7 v9 B( y4 ^% L: J7 `. g
Server 的Backup Code?' I$ H% f1 b5 j4 h& l2 i& [; o7 v6 X
so funny, thanks a lot! + p1 V8 p, `. Q: d
/ G* x1 m- I, o/ X- u: W好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面
' {6 y3 R Y! KMaximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff)
6 x7 {! V+ x4 s- T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)
& C! E! x" f! C3 oe.g.: m: N3 o% m) S0 n5 O1 V; w2 Z
0 + 4294967295 = 4294967295 (max)4 T, a7 @% O/ s4 y% x4 w+ A
1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)
" j6 p; E2 V! w; e! v7 {" Pand so on....
* W2 u" [; k# O, \6 p, r- H9 P) s
" ]# z- d! p* a, A: Q! n! } _[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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