|
 
- 帖子
- 362
- 精華
- 0
- 威望
- 126
- 魅力
- 0
- 讚好
- 0
- 性別
- 男
|
3#
發表於 2005-6-19 06:50 PM
| 只看該作者
Originally posted by secretfj at 2005-6-19 06:37 PM:
6 `3 L: H0 O& n8 M2 E) b0 S; ?有無人知點解?( _) f# K, F1 e; K# k# P6 I% y
Server 的Backup Code?
3 Y% |- d o) Kso funny, thanks a lot! # n* v' U u" H( ~' q+ g- A8 g
3 `5 p, W+ B# {6 W: J' l. @
好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面6 g! h' D1 k- T: m1 ?/ d( N2 Y) Y7 O
Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff)
1 p Y$ e4 c' n% v- v- D* o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)* B8 {% ^) I' k; Y
e.g.: y7 s2 ], @ j, c
0 + 4294967295 = 4294967295 (max)
6 |, T; R/ K* n* Y# B1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow): T5 C1 x6 I: @5 _
and so on....
" i; j) E; w0 l/ c" y4 |
, s1 G5 |7 o% k* [[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
|