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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:; B: @/ f# T5 C# P# v
有無人知點解?& L. ] } c- c6 a1 j
Server 的Backup Code?
/ b, q% B; }0 E9 W9 g; vso funny, thanks a lot! ; s; w* w1 m \" s5 `" U) V" I* N, E$ \; L9 K" p
好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面2 s# N" X7 a) g( Y4 ^. E& Y
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff)
% @1 N$ ?8 U* S3 ~/ U. 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)
( {: W9 p) ` v/ ue.g.
$ g8 |0 N; x& @: W1 T0 + 4294967295 = 4294967295 (max)
( o% H, @/ Y* m1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)
% E, Y2 i4 {' A! E3 Jand so on....
- p8 ?# b( R3 G# R' i- E+ m
% `: _9 s/ \ }6 B- z3 A[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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