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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:
+ ~* w, d3 }, u5 t有無人知點解?
# G# E0 Y1 i9 U. b- k% Q5 j) d2 ~% LServer 的Backup Code?
4 t: x& {. f W) qso funny, thanks a lot! ( R/ i% `+ d' c/ l9 g( z
% l$ X6 n' v$ Y好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面; J* g7 R9 G; j S) `$ D
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) ; T D, z: m& Q- |# E' F1 x& d, 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)
/ ]0 p: w) H+ Z+ ?) h9 ie.g.
s; c6 T% g6 h. a7 @5 M) b0 + 4294967295 = 4294967295 (max)5 W2 B" e+ g, H5 p& p v
1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)+ [2 F, C. Y K
and so on....
0 i/ X4 E# P# k$ C2 C: u1 }2 @& X+ _7 Z# g) k' b' y6 u
[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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