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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:
' R" H+ P" c y- l7 w, _* E有無人知點解?
: g! z2 Z2 K, k! z# s1 IServer 的Backup Code?, t- n0 z: u8 i. Z+ X& @
so funny, thanks a lot! & ]& t. j% y Q+ a
: M- w. }6 M1 a3 N5 c好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面* {1 ?' F+ y1 D
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) 5 o0 D1 O6 B# I$ [9 ?2 g
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)
( o& z8 _ _, l+ F3 m8 te.g.1 u7 U( k8 N; I. r. P' E, K
0 + 4294967295 = 4294967295 (max)% o* }6 r2 P* D- @% A6 ~4 d
1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)+ R2 c+ k1 P) I
and so on....
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. w" D8 @) k/ i/ \5 l! \[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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