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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:
) q/ N& e+ H9 V: x/ o2 s有無人知點解?# u1 p' q3 S, T, i
Server 的Backup Code?
& h: [4 e, t! Pso funny, thanks a lot! I. B# \. r3 e
8 s. Z u0 J2 {& K( l好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面
' W: M- e0 s5 b$ QMaximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff) ) A4 U+ S5 T, l9 Y6 M
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)/ i9 T0 o( q# I7 H9 M% L
e.g.
# V! e4 u& @ R. L+ ^; o1 p9 U0 + 4294967295 = 4294967295 (max): G, a& {; E5 Z! N- c
1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)+ K' R2 z* }: A$ `8 S j
and so on...." j) y# S7 c; G4 I5 ~4 y
) E# B# u7 Y7 b. S1 w% S9 e" X
[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
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