gaye

Originally posted by secretfj at 2005-6-19 06:37 PM:
1 W! \8 G( n1 P/ e有無人知點解?& I6 Y$ D4 a" W' d; ?% u
Server 的Backup Code?
7 q0 V3 h: `6 Y; i: I- k* Kso funny, thanks a lot!

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1 U, G( L" _5 P( [8 m6 B- n  X+ _好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面
  j; O, ~7 b$ b$ ], ]6 C  oMaximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) . c$ q3 G: |4 n5 J: w. |$ c0 B+ H
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); M& t0 b4 Y9 a9 [' V- ^+ W1 N
e.g.
2 @' N+ P. ]2 w8 H, h0 + 4294967295 = 4294967295 (max)
7 t/ ~. o" F9 ]; P3 I8 [6 E( @1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)
% Z+ V* v" @7 [( }: Kand so on....+ E  m/ ~3 v! X; p' u0 w

' W$ c! [$ c7 b. _1 q2 \[ Last edited by gaye on 2005-6-19 at 06:57 PM ]

gaye

Originally posted by crap at 2005-6-19 07:14 PM:$ w5 _& ^  @0 b. Y! r5 l
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) N3 f, R* ^1 C7 R8 {小弟都係比較多睇電腦雜誌