gaye

Originally posted by secretfj at 2005-6-19 06:37 PM:
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Server 的Backup Code?
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好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面
- n2 U# M. v/ ^Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff)
. B& g; s  ^9 _' ?5 r& h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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0 + 4294967295 = 4294967295 (max)9 y2 O" `5 L1 F7 \6 Z( F5 t8 e6 j4 Y* M
1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)1 N* V! J8 N0 a
and so on....- p+ ], @# ~8 C1 v
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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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0 A. @3 W" i  U' O4 c小弟都係比較多睇電腦雜誌