gaye

Originally posted by secretfj at 2005-6-19 06:37 PM:
  V& m: w8 E* G9 b# f有無人知點解?, Q- q; K6 k) h- S; U
Server 的Backup Code?
+ ~* O; `& [! X. \so funny, thanks a lot!

# R( W1 s$ ]$ Y+ v* @
( q! Q$ X: ]5 c$ i& `
好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面$ s5 k8 Q4 Z' p- s
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff)
# k% r5 b7 Q8 l2 R7 T$ |1 X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)
1 H9 a$ }# t/ r, Z( V( l# Ae.g.% o% R' O" l( J. L7 h# @
0 + 4294967295 = 4294967295 (max)
  H2 b; Q7 w% p: Y7 n+ Y, ^1 O1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)
2 O5 z, p3 J- {% a$ }" G% |+ |and so on....0 L$ X0 N( I2 y' u# S
) L* ~" B+ G' [- O* C( U. @
[ Last edited by gaye on 2005-6-19 at 06:57 PM ]

gaye

Originally posted by crap at 2005-6-19 07:14 PM:* s4 I& _! }- ^" Q: e/ i8 `* w* L
3 v; x( C- H+ C+ A* x- l9 x

7 n) g7 y; Q' ]$ }' G% ]嘩

6 X* S5 l, ^9 O) @- f* k
# p; l2 q7 b5 ?( l8 i小弟都係比較多睇電腦雜誌