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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:
' w2 t# D; B& Y( D; z7 B有無人知點解?7 w5 b( P# Z$ K: T' x
Server 的Backup Code?9 E9 ~, M0 O$ O5 \4 K5 |
so funny, thanks a lot! 6 o3 p" M% X! N( M1 j& V7 a
4 m+ L' p5 u. y好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面6 `" j# V% \" E% z2 ^8 b8 N0 [
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) 0 X$ m; g7 @" x6 A
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)
4 ]% l9 I* ], m" [4 J1 [" M* Pe.g.; W' a# _# H* k5 d# _: T# L
0 + 4294967295 = 4294967295 (max)
. U! [: i# b1 F' U; n1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)
) u- t+ T( ?1 a; Land so on....6 i+ X5 F [/ R+ q$ W" z% B/ U& o1 E
3 v/ o. |" X0 m8 p% g+ q! O[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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