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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:' W5 L9 d; ^7 T' P" x' B4 X
有無人知點解?
6 w6 S2 e4 G. B% nServer 的Backup Code?* x+ J. ?# \, G2 E
so funny, thanks a lot! , c# h5 l- ~/ w O I0 H9 b+ b5 D, n6 Z2 ^
好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面2 M4 }$ w1 g/ B' s7 Q; ]' p8 y
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) + n: o! J; F# K' L& Q1 E
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)
' S, p, B$ V3 k9 L/ _/ p4 C1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)
. N( W/ n, Y' I' Land so on....
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[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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