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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:/ p3 Y! A- i; P" T
有無人知點解?
% P; I7 w* s, ]9 C% DServer 的Backup Code?( A# l: u4 [7 m9 k
so funny, thanks a lot! . Y: A8 B Z$ ^* j5 \2 \
# X0 l8 L9 C6 U3 |4 K- ?+ B好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面
0 m& v" d- e' J! S2 F. l" ?/ PMaximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) ( z9 B; }' f6 F' e" ~2 s9 j
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)1 x# x+ S+ c& A) q
e.g.
: ?; P6 X8 K G1 g8 {0 + 4294967295 = 4294967295 (max)
6 \6 }8 c) @& [) x6 w9 R7 y1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)' l- c. B) @2 T( }
and so on....
* Y0 ~& N$ c- O" o% `2 Z+ T
; o/ b# j- |! H, r- W[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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