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發表於 2005-6-19 06:50 PM
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Originally posted by secretfj at 2005-6-19 06:37 PM:
; f! S5 r4 F% P有無人知點解?
8 p1 h* z6 d, uServer 的Backup Code?/ Z1 Y5 r2 c. @) i! Z* ]
so funny, thanks a lot!
2 V% k8 {: w5 G# A好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面
g/ K3 c& d" i; B; ^Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) ( N( ^4 z( V" B4 `' E$ ?
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)$ R) \' z4 Y8 }- E- T- T$ ]% N
e.g.
) O0 l8 \8 R y) \% o6 U: I5 a0 + 4294967295 = 4294967295 (max)
8 @" T$ ]4 V- d1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)
6 r: w* k' @" t) N0 ?and so on...." C/ V$ J( B" z$ q! r! b
7 f3 {# U& E1 m# E" R[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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