gaye

Originally posted by secretfj at 2005-6-19 06:37 PM:
6 Z' U: ]# ~0 W有無人知點解?  C: M3 l) o' G& O0 ~
Server 的Backup Code?0 s! F& l6 p: I% u3 E- P
so funny, thanks a lot!

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好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面5 E5 ~0 @6 s, `( o+ e9 s+ {4 b0 \+ S$ k
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) 9 {. r, t( t8 t4 @
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)
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; `" L4 n7 U/ |) S0 + 4294967295 = 4294967295 (max)) o' i* m1 s! h5 e* Q, f" n
1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)4 m# [! S; N8 N0 @
and so on....( C. t$ l* I# F) R- w) h) b$ T3 J
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[ Last edited by gaye on 2005-6-19 at 06:57 PM ]

gaye

Originally posted by crap at 2005-6-19 07:14 PM:
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$ \! r# O( Q3 @/ [嘩

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, C, Q& ^) [) M( _7 M小弟都係比較多睇電腦雜誌