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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:
0 s: f; S3 C+ K) \: J2 P8 Z有無人知點解?
- ^$ w( l. u8 {5 }0 T. W- K- H. BServer 的Backup Code?
* O3 R, O9 z- {3 qso funny, thanks a lot! O- E$ @) M+ F+ Q
/ c: J) x. J' A- s- |" A0 [好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面! Q! U# J# Y; y6 l% ]( U
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff)
1 ]% r# X# e( f2 N4 P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)
. ^! ~6 \( S) }! o% ?- E9 X; ae.g.
j+ s6 U* h" W5 w0 + 4294967295 = 4294967295 (max)
7 z8 k5 |! a, e* ?$ c5 Z7 h1 \1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)' [2 N2 h: b5 f5 X; t0 {
and so on.... r7 b8 n" D" I/ _8 A# L: I% Z4 E
' n, P1 i, w' r, u8 m+ z( \
[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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