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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:( n0 I' c5 w. T& m2 U# O5 t, z
有無人知點解?. J9 H' y, r' \' I2 p2 p
Server 的Backup Code?- Z# k+ U( L/ }, [. l; q
so funny, thanks a lot! + l: x v! R, K! r9 a C) `
/ Y& J' R) O% v0 ~: n# R好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面
9 H5 |3 e# T/ G3 t9 L& aMaximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) / Z$ \+ f6 t7 F; K, J& t+ ~
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)
g; z$ k% ~: ne.g.' R5 {" W4 y o$ w& l7 m( o& e
0 + 4294967295 = 4294967295 (max)
3 Y- M6 b2 U( n' j& y1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)
7 \$ e2 B9 Q0 s. D- G+ z- Sand so on....
# B' e, N& T1 h( y4 N+ H9 i& W! }% \$ u3 A" q2 Y3 I9 }( X
[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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