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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:
( K- ~9 u/ U, y$ ]4 H8 k& J有無人知點解?( [# Y3 c ]: Y, @) M" G
Server 的Backup Code?
. O& r# w& n: M8 O6 Kso funny, thanks a lot! 7 c% _4 n6 B! M! _; \7 }1 S* A# n
D, p7 }0 Z; v+ C好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面) ?6 l. _+ d% O4 F7 V. v
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) 7 w7 U$ O- v$ L) N3 W% I
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)
G& t$ j0 |' Le.g.( R4 Z0 W, G/ C7 y
0 + 4294967295 = 4294967295 (max)6 M2 q1 u' z1 b: i; |: P
1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)4 l( Q% G, A. {" w: C/ r
and so on....7 _* X2 g' f3 A3 Y- D& @; `
+ u z% B1 i# w9 R
[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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