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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, b+ Z% P% v9 k有無人知點解?# @7 M2 Y( j& h' E+ B8 ?
Server 的Backup Code?$ \) U. L) T) ?; U- F9 t; T5 t
so funny, thanks a lot! 0 N4 D1 ?1 l" d6 }; S4 H) n- y7 ]- a# c; f% {* u
好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面
/ O5 v* F" Y* g2 CMaximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) 5 c8 q; P( A' \6 `" l9 U
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)
, a5 z% ]: A6 f1 ~; ~7 e" ce.g.
7 |: |' C; P( ]# [9 Y) B" J2 h7 g0 + 4294967295 = 4294967295 (max)
" i8 ]0 Z, D0 I+ ]0 k1 L; B1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)- o$ o4 e, J3 Y3 Q
and so on....# {; g F, s# C: {- ?0 U" j$ N
4 [0 F' ]/ i# M9 a
[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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