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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:# H) [; A- C% K9 ~; P
有無人知點解?
3 |* C9 F% i; O2 S( q2 L) g; c, X2 CServer 的Backup Code?; Y. l7 p9 @: X+ g6 g6 ?0 x
so funny, thanks a lot! ) v* N3 W, b! s' v4 b" e
% L- n9 ^- f5 p; k) K6 T好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面
w( P. L' B9 l) FMaximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff)
0 n, r0 Z9 W; i9 Q/ x; A9 m2 c. L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)
3 O3 W" G. [, H. T, I+ b$ J( ~+ S Ke.g.
$ U3 D( R( N4 z5 g8 c: y1 N0 + 4294967295 = 4294967295 (max)& F. G, \- b. u0 r1 {7 |& @
1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)6 J6 M. `% x& E+ X9 p
and so on....% ~. C, i" \+ O7 Y2 \* |
$ i: Z) K- {, k: a, q
[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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