gaye

Originally posted by secretfj at 2005-6-19 06:37 PM:4 _9 o: Z* Y/ l
有無人知點解?" T% o$ I2 I6 f$ P
Server 的Backup Code?1 e+ S: G$ r& r" j, ?. i- Z+ z9 u
so funny, thanks a lot!

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" @( i' ^% K; v好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面3 r2 D# @, r' Y& f- y  _7 K; [0 l8 d
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) , T! ~' A+ o2 Q
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)
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5 [2 V! l; A4 f3 H0 + 4294967295 = 4294967295 (max)* n3 O& K9 W/ ^2 W8 z4 |! Z
1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)
0 k* r. @0 K. C' kand so on....- f' ^* q% B$ K* z0 I

3 P+ y+ c' {5 C- }. a- {[ Last edited by gaye on 2005-6-19 at 06:57 PM ]

gaye

Originally posted by crap at 2005-6-19 07:14 PM:9 {" W$ V& E1 N1 Z4 O- ]/ V: j1 j
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嘩

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" @, V- I' B) X小弟都係比較多睇電腦雜誌