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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:; \, Y6 ] y/ w/ o' v; z
有無人知點解?# v6 V# _5 n2 W0 d1 D
Server 的Backup Code?3 `, r( Y7 z# R1 u- d* N
so funny, thanks a lot! ( o. B0 |8 h9 I3 T+ l5 Z
. W' d: L2 w% q, c" d# I好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面0 N3 |" I6 ?. }; X
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) % j5 }9 |2 Y7 ?1 ^; S$ T6 ?+ C, [
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)
8 v( g2 {, x$ L& Xe.g.- ?" _8 z0 f/ @1 H
0 + 4294967295 = 4294967295 (max), d8 x/ q5 b! G0 {4 S/ }. |
1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)( I# l2 ^; I! S9 B+ D
and so on....
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4 ^4 @6 z/ s" u8 V[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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