level 11
没啊。 看到 "123"+14，这样的表达式 有人说可能产生指针回绕。
之前没怎么了解这个名词，就来寻求下答案了。
2011年11月17日 14点11分
level 15
en.喂鸡.org/wiki/Integer_overflow
Since an arithmetic operation may produce a result larger than the
maximum representable value, a potential error condition may result. In
the C programming language, signed integer overflow causes undefined behavior, while unsigned integer overflow causes the number to be reduced modulo a power of two, meaning that unsigned integers "wrap around" on overflow.
擦，还有这种意思……![[拍砖]](/static/emoticons/u62cdu7816.png)
难怪我听说溢出越界的说法都有。。。
2011年11月17日 14点11分
6
Since an arithmetic operation may produce a result larger than the
maximum representable value, a potential error condition may result. In
the C programming language, signed integer overflow causes undefined behavior, while unsigned integer overflow causes the number to be reduced modulo a power of two, meaning that unsigned integers "wrap around" on overflow.
擦，还有这种意思……
难怪我听说溢出越界的说法都有。。。
level 11
![[瞌睡]](/static/emoticons/u778cu7761.png)
level 12
level 12
level 14
![[大笑]](/static/emoticons/u5927u7b11.png)
或者说程序猿不需要关心.
level 12
level 14
![[鲁拉]](/static/emoticons/u9c81u62c9.png)
再说不同的OS内核空间都不一样,设备映射就更不一样.即便你写driver,也不需要关系你的指针在哪儿.
level 12
level 11
level 14
level 11