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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:) A0 K/ _$ I; \! u; D
有無人知點解?
/ E+ Y- _& F5 xServer 的Backup Code?/ F# d: ]" a# c
so funny, thanks a lot! 0 Z/ L2 P+ A0 f2 Y4 g
3 H9 [) h2 x, Z1 E+ c6 {2 a好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面1 q6 O# S. r J4 t; R7 h/ a9 b( c4 e8 d6 r, D
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff)
; K4 Z7 t4 \: w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)
8 P+ a, {8 ~9 e5 c7 y% N- De.g.! D3 D, S% N2 {, z, _6 P2 I
0 + 4294967295 = 4294967295 (max)
' P: J! Y, W6 B# b( ~( s- B4 l9 j( M1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)
- c) A& ^4 h1 x- dand so on....
+ W% d+ {, g0 N5 s; s& g+ s$ ^& }
) \% F! R- |$ s3 y8 O2 s6 j[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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