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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: L( I$ ?1 M. g9 I# G8 d* c" w
有無人知點解?/ N! v1 k% M* w! T! P+ V# S
Server 的Backup Code?
, L2 V! b5 z$ U' W' n; s, lso funny, thanks a lot! 6 J* ~ G4 m1 \
, k1 ]1 P, }. r5 I& E好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面# M' W. m% X! d5 Z
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) 8 G" v/ @& q! p! C4 x
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): x6 I) }( i0 }2 D3 i" `/ i1 A2 _+ Q. C
e.g.( x( k8 g& ]- @6 O
0 + 4294967295 = 4294967295 (max)
, _1 ]" M4 u% G! B' X2 [# `2 `1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)/ L( ^/ H* I" m& X2 }7 ^
and so on....) n8 H. {+ q& U* X' W, O6 j. M
* y: O" J1 ^; _0 L' I' b" F! y9 C[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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