|
 
- 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:
2 L8 l+ f2 h# b1 D7 @1 ^# Y4 N有無人知點解?
' u. X# l- N/ S4 PServer 的Backup Code?5 q& O8 j! o( u/ n/ e" s: V
so funny, thanks a lot! - S; ~0 H( V9 T6 P% b. j. |
, I. r- ~5 Z* z6 G' |好簡單, ICQ 應該係 Visual C++ 寫的 , 而係 Visual C++ 入面
: Y+ x. L5 X; L8 m' v* ]1 e: \Maximum value for a variable of type "unsigned int" 係 4294967295 (0xffffffff)
4 S2 _5 r7 k5 c) B, c- |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 n8 s" l8 r0 r2 D+ M3 @
e.g., K& f# ^/ p+ S5 i9 H& i N4 D
0 + 4294967295 = 4294967295 (max)
( t4 @) |, s3 o% {1 + 4294967295 = 0 + 4294967296 = 0 (because of overflow)- z5 R; N# v8 P: O+ S
and so on....* x/ i- [* M8 c+ B; Q
* S2 Q: i: B( U! C8 Q; P( ^
[ Last edited by gaye on 2005-6-19 at 06:57 PM ] |
|